[Lassar]

After checking, and inventing several different antennas, have decided on the
Centipede-4 repacked antenna & 4 bay uhf bow-tie for vhf. (indoor antennas)

Centipede-4 repacked antenna has very flat gain. (470-608 mhz)

Centipede-4 Repack antenna (470-608 mhz) nec code:

CM "Centipede-4 Repacked antenna" (470-608 mhz) High Gain UHF Antenna
CE
GW    2    33    0    2.2312189    -16.734142    0    13.1641915    -16.734142    0.07281895
GW    3    37    0    2.2312189    -16.734142    0    13.1641915    -11.156094    0.07281895
GW    4    37    0    2.2312189    -16.734142    0    13.1641915    -22.312188    0.07281895
GW    5    33    0    2.2312189    -5.5780472    0    13.1641915    -5.5780472    0.07281895
GW    6    37    0    2.2312189    -5.5780472    0    13.1641915    0    0.07281895
GW    7    37    0    2.2312189    -5.5780472    0    13.1641915    -11.156094    0.07281895
GW    8    33    0    2.2312189    5.57804724    0    13.1641915    5.57804724    0.07281895
GW    9    37    0    2.2312189    5.57804724    0    13.1641915    11.1560944    0.07281895
GW    10    37    0    2.2312189    5.57804724    0    13.1641915    0    0.07281895
GW    11    33    0    2.2312189    16.7341417    0    13.1641915    16.7341417    0.07281895
GW    12    37    0    2.2312189    16.7341417    0    13.1641915    22.312189    0.07281895
GW    13    37    0    2.2312189    16.7341417    0    13.1641915    11.1560944    0.07281895
GW    14    35    0    2.82035485    27.5675952    0    13.1641915    22.312189    0.07281895
GW    15    3    0    1.11560945    -5.5780472    0    2.2312189    -5.5780472    0.07281895
GW    16    17    0    1.11560945    -5.5780472    0    1.11560945    -11.156094    0.07281895
GW    17    17    0    1.11560945    -11.156094    0    1.11560945    -16.734142    0.07281895
GW    18    3    0    1.11560945    -16.734142    0    2.2312189    -16.734142    0.07281895
GW    19    3    0.5801169    0.44624379    -10.932972    0    1.11560945    -11.156094    0.07281895
GW    20    3    0    1.11560945    16.7341417    0    2.2312189    16.7341417    0.07281895
GW    21    17    0    1.11560945    16.7341417    0    1.11560945    11.1560944    0.07281895
GW    22    17    0    1.11560945    11.1560944    0    1.11560945    5.57804724    0.07281895
GW    23    3    0    1.11560945    5.57804724    0    2.2312189    5.57804724    0.07281895
GW    24    3    0.5801169    0.44624379    10.9329726    0    1.11560945    11.1560944    0.07281895
GW    25    33    0.5801169    0.4462438    -10.93298    0.5801169    1.1156094    0    0.072819
GW    26    33    0.58011693    1.11560942    0    0.58011693    0.44624381    10.932972    0.07281898
GW    27    35    0    2.8203669    -27.56762    0    13.1641915    -22.312188    0.07281895
GW    28    33    0    -2.2312188    -16.734142    0    -13.164191    -16.734142    0.07281895
GW    29    37    0    -2.2312188    -16.734142    0    -13.164191    -11.156094    0.07281895
GW    30    37    0    -2.2312188    -16.734142    0    -13.164191    -22.312188    0.07281895
GW    31    33    0    -2.2312188    -5.5780472    0    -13.164191    -5.5780472    0.07281895
GW    32    37    0    -2.2312188    -5.5780472    0    -13.164191    0    0.07281895
GW    33    37    0    -2.2312188    -5.5780472    0    -13.164191    -11.156094    0.07281895
GW    34    33    0    -2.2312188    5.57804724    0    -13.164191    5.57804724    0.07281895
GW    35    37    0    -2.2312188    5.57804724    0    -13.164191    11.1560944    0.07281895
GW    36    37    0    -2.2312188    5.57804724    0    -13.164191    0    0.07281895
GW    37    33    0    -2.2312188    16.7341417    0    -13.164191    16.7341417    0.07281895
GW    38    37    0    -2.2312188    16.7341417    0    -13.164191    22.312189    0.07281895
GW    39    37    0    -2.2312188    16.7341417    0    -13.164191    11.1560944    0.07281895
GW    40    35    0    -2.8203544    27.5675957    0    -13.164191    22.312189    0.07281895
GW    41    3    0    -1.1156094    -5.5780472    0    -2.2312188    -5.5780472    0.07281895
GW    42    17    0    -1.1156094    -5.5780472    0    -1.1156094    -11.156094    0.07281895
GW    43    17    0    -1.1156094    -11.156094    0    -1.1156094    -16.734142    0.07281895
GW    44    3    0    -1.1156094    -16.734142    0    -2.2312188    -16.734142    0.07281895
GW    45    3    0.5801169    -0.4462438    -10.932972    0    -1.1156094    -11.156094    0.07281895
GW    46    3    0    -1.1156094    16.7341417    0    -2.2312188    16.7341417    0.07281895
GW    47    17    0    -1.1156094    16.7341417    0    -1.1156094    11.1560944    0.07281895
GW    48    17    0    -1.1156094    11.1560944    0    -1.1156094    5.57804724    0.07281895
GW    49    3    0    -1.1156094    5.57804724    0    -2.2312188    5.57804724    0.07281895
GW    50    3    0.5801169    -0.4462438    10.9329726    0    -1.1156094    11.1560944    0.07281895
GW    51    33    0.58011693    -0.4462434    -10.932978    0.58011693    -1.115609    0    0.07281898
GW    52    33    0.58011693    -1.115609    0    0.58011693    -0.4462434    10.932972    0.07281898
GW    53    35    0    -2.8203678    -27.56762    0    -13.164191    -22.312188    0.07281895
GW    1    7    0.5801169    -1.1156094    0    0.5801169    1.11560945    0    0.06895
GS    0    0    0.0254        ' All in in.
GE    0
EK
EX    0    1    4    0    1    0
GN    -1
FR    0    1    0    0    539    0

Here is the 4 bay bow-tie antenna for vhf modeled in my window frame.

4 bay vhf antenna (in window frame) nec code:

CM 4 bay vhf antenna in window frame: 
CM 9 inch bow length
CM VHF Gain: 5.19 to 6.24 to 5.82 db, Swr 2.49 to 3.186
CM No Auto Segmentation
CE
GW    1    3    -1.37e-16    29.74536    1.2441859    -1.37e-16    30.99536    1.2441859    0.01598073
GW    4    21    -1.37e-16    39.69386    9.761056    -1.37e-16    30.99536    7.451056    0.0404
GW    5    21    -1.37e-16    39.69386    5.141056    -1.37e-16    30.99536    7.451056    0.0404
GW    6    21    -1.37e-16    29.74536    7.451056    -1.37e-16    21.04686    9.761056    0.0404
GW    7    21    -1.37e-16    29.74536    7.451056    -1.37e-16    21.04686    5.141056    0.0404
GW    8    21    -1.37e-16    39.69386    -7.272684    -1.37e-16    30.99536    -4.962684    0.0404
GW    9    21    -1.37e-16    39.69386    -2.652684    -1.37e-16    30.99536    -4.962684    0.0404
GW    10    21    -1.37e-16    29.74536    -4.962684    -1.37e-16    21.04686    -7.272684    0.0404
GW    11    21    -1.37e-16    29.74536    -4.962684    -1.37e-16    21.04686    -2.652684    0.0404
GW    12    21    -1.37e-16    39.69386    21.796556    -1.37e-16    30.99536    19.486556    0.0404
GW    13    21    -1.37e-16    39.69386    17.176556    -1.37e-16    30.99536    19.486556    0.0404
GW    14    21    -1.37e-16    29.74536    19.486556    -1.37e-16    21.04686    21.796556    0.0404
GW    15    21    -1.37e-16    29.74536    19.486556    -1.37e-16    21.04686    17.176556    0.0404
GW    16    21    -1.37e-16    39.69386    -19.30818    -1.37e-16    30.99536    -16.99818    0.0404
GW    17    21    -1.37e-16    39.69386    -14.68818    -1.37e-16    30.99536    -16.99818    0.0404
GW    18    21    -1.37e-16    29.74536    -16.99818    -1.37e-16    21.04686    -19.30818    0.0404
GW    19    21    -1.37e-16    29.74536    -16.99818    -1.37e-16    21.04686    -14.68818    0.0404
GW    20    3    -1.37e-16    30.99536    19.486556    -1.37e-16    30.99536    18.611556    0.0254
GW    21    3    -1.37e-16    29.74536    19.486556    -1.37e-16    29.74536    18.611556    0.0254
GW    22    1    -1.37e-16    30.99536    8.326056    -1.37e-16    30.99536    7.451056    0.0254
GW    23    1    -1.37e-16    29.74536    8.326056    -1.37e-16    29.74536    7.451056    0.0254
GW    24    9    -1.366e-16    29.7453597    8.32605597    0.625    30.3703597    13.468806    0.0254
GW    25    9    -1.366e-16    30.9953597    18.6115559    0.625    30.3703597    13.468806    0.0254
GW    26    9    -1.366e-16    30.9953597    8.32605597    -0.625    30.3703597    13.468806    0.0254
GW    27    9    -1.366e-16    29.7453597    18.6115559    -0.625    30.3703597    13.468806    0.0254
GW    28    3    -1.37e-16    30.99536    -16.99818    -1.37e-16    30.99536    -16.12318    0.0254
GW    29    3    -1.37e-16    29.74536    -16.99818    -1.37e-16    29.74536    -16.12318    0.0254
GW    30    1    -1.37e-16    30.99536    -5.837684    -1.37e-16    30.99536    -4.962684    0.0254
GW    31    1    -1.37e-16    29.74536    -5.837684    -1.37e-16    29.74536    -4.962684    0.0254
GW    32    9    -1.37e-16    29.74536    -5.837684    -0.625    30.37036    -10.98043    0.0254
GW    33    9    -1.37e-16    30.99536    -16.12318    -0.625    30.37036    -10.98043    0.0254
GW    34    9    -1.366e-16    30.9953597    -5.8376841    0.625    30.3703597    -10.980434    0.0254
GW    35    9    -1.366e-16    29.7453597    -16.123184    0.625    30.3703597    -10.980434    0.0254
GW    36    17    -1.37e-16    30.99536    7.451056    -1.37e-16    30.99536    1.2441859    0.0254
GW    37    17    -1.37e-16    29.74536    7.451056    -1.37e-16    29.74536    1.2441859    0.0254
GW    38    17    -1.37e-16    30.99536    -4.962684    -1.37e-16    30.99536    1.2441859    0.0254
GW    39    17    -1.37e-16    29.74536    -4.962684    -1.37e-16    29.74536    1.2441859    0.0254
GW    56    16    0    40.5    30.5    0    40.5    -27    0.5
GW    57    5    0    20.5    30.5    0    40.5    30.5    0.5
GW    58    5    0    20.5    -27    0    40.5    -27    0.5
GW    59    13    0    -20    30.5    0    20.5    30.5    0.5
GW    60    13    0    -20    -27    0    20.5    -27    0.5
GW    61    17    0    -20    30.5    0    -20    -27    0.5
GW    62    5    0    -40    30.5    0    -20    30.5    0.5
GW    63    5    0    -40    -27    0    -20    -27    0.5
GW    108    17    0    20.5    30.5    0    20.5    -27    0.5
GW    109    17    0    -40    30.5    0    -40    -27    0.5
GS    0    0    0.0254        ' All in in.
GE    0
EK
LD    5    0    0    0    1.67e7    0
EX    0    1    2    0    1    0
GN    -1
FR    0    1    0    0    201    0
RP 0 1 73 1510 90 0 1 5 0 0

Have fun building building antennas.

 

[Cham]

Is the gain bi-directional or do you have a reflector modelled for this design?

 

[Lassar]

The gain is bi-directional.

A reflector would be easy to add to it.

Take your most important weakest channel, and find the 1/4 wavelength of that channel, and put the
reflector 1/4 wavelength behind it.

That would add about 2 to 3 db to the gain.

Also you could add a loop to increase it's vhf.

In my case putting it in my window frame, increases the gain from about 3.59 to 5.24 db.

But the swr is only good for about 198 thru 216 mhz.

That is why I thinking about adding a vhf ff4 4 bay uhf style to my side frame.

The swr is more flat in it, and it gives me about 6.2 db gain.

 

[ljhavener]

4 bay vhf antenna (in window frame) nec code:

The unusual blip, in the results between 174mhz and 179mhz, are the result of improper segmentation. You have wires of equal lengths, with different numbers of segments. Some of them are actually mirrors of each other. I usually use manual segmentation when I'm combining very thick elements, with very thin elements, but elements of the same radius should have similar length segments. This model is better segmented and the blip at 176mhz goes away.

CM 4 bay vhf antenna in window frame:
CM 9 inch bow length
CM VHF Gain: 5.19 to 6.24 to 5.82 db, Swr 2.49 to 3.186
CM No Auto Segmentation
CM Improved Segmentation.  Solves blip in results at 176mhz.
CE
SY Rsrc=0.026
GW    1    3    -1.37e-16    29.74536    1.2441859    -1.37e-16    30.99536    1.2441859    Rsrc
GW    4    11    -1.37e-16    39.69386    9.761056    -1.37e-16    30.99536    7.451056    0.0404
GW    5    11    -1.37e-16    39.69386    5.141056    -1.37e-16    30.99536    7.451056    0.0404
GW    6    11    -1.37e-16    29.74536    7.451056    -1.37e-16    21.04686    9.761056    0.0404
GW    7    11    -1.37e-16    29.74536    7.451056    -1.37e-16    21.04686    5.141056    0.0404
GW    8    11    -1.37e-16    39.69386    -7.272684    -1.37e-16    30.99536    -4.962684    0.0404
GW    9    11    -1.37e-16    39.69386    -2.652684    -1.37e-16    30.99536    -4.962684    0.0404
GW    10    11    -1.37e-16    29.74536    -4.962684    -1.37e-16    21.04686    -7.272684    0.0404
GW    11    11    -1.37e-16    29.74536    -4.962684    -1.37e-16    21.04686    -2.652684    0.0404
GW    12    11    -1.37e-16    39.69386    21.796556    -1.37e-16    30.99536    19.486556    0.0404
GW    13    11    -1.37e-16    39.69386    17.176556    -1.37e-16    30.99536    19.486556    0.0404
GW    14    11    -1.37e-16    29.74536    19.486556    -1.37e-16    21.04686    21.796556    0.0404
GW    15    11    -1.37e-16    29.74536    19.486556    -1.37e-16    21.04686    17.176556    0.0404
GW    16    11    -1.37e-16    39.69386    -19.30818    -1.37e-16    30.99536    -16.99818    0.0404
GW    17    11    -1.37e-16    39.69386    -14.68818    -1.37e-16    30.99536    -16.99818    0.0404
GW    18    11    -1.37e-16    29.74536    -16.99818    -1.37e-16    21.04686    -19.30818    0.0404
GW    19    11    -1.37e-16    29.74536    -16.99818    -1.37e-16    21.04686    -14.68818    0.0404
GW    20    1    -1.37e-16    30.99536    19.486556    -1.37e-16    30.99536    18.611556    0.0254
GW    21    1    -1.37e-16    29.74536    19.486556    -1.37e-16    29.74536    18.611556    0.0254
GW    22    1    -1.37e-16    30.99536    8.326056    -1.37e-16    30.99536    7.451056    0.0254
GW    23    1    -1.37e-16    29.74536    8.326056    -1.37e-16    29.74536    7.451056    0.0254
GW    24    5    -1.366e-16    29.7453597    8.32605597    0.625    30.3703597    13.468806    0.0254
GW    25    5    -1.366e-16    30.9953597    18.6115559    0.625    30.3703597    13.468806    0.0254
GW    26    5    -1.366e-16    30.9953597    8.32605597    -0.625    30.3703597    13.468806    0.0254
GW    27    5    -1.366e-16    29.7453597    18.6115559    -0.625    30.3703597    13.468806    0.0254
GW    28    1    -1.37e-16    30.99536    -16.99818    -1.37e-16    30.99536    -16.12318    0.0254
GW    29    1    -1.37e-16    29.74536    -16.99818    -1.37e-16    29.74536    -16.12318    0.0254
GW    30    1    -1.37e-16    30.99536    -5.837684    -1.37e-16    30.99536    -4.962684    0.0254
GW    31    1    -1.37e-16    29.74536    -5.837684    -1.37e-16    29.74536    -4.962684    0.0254
GW    32    5    -1.37e-16    29.74536    -5.837684    -0.625    30.37036    -10.98043    0.0254
GW    33    5    -1.37e-16    30.99536    -16.12318    -0.625    30.37036    -10.98043    0.0254
GW    34    5    -1.366e-16    30.9953597    -5.8376841    0.625    30.3703597    -10.980434    0.0254
GW    35    5    -1.366e-16    29.7453597    -16.123184    0.625    30.3703597    -10.980434    0.0254
GW    36    17    -1.37e-16    30.99536    7.451056    -1.37e-16    30.99536    1.2441859    0.0254
GW    37    17    -1.37e-16    29.74536    7.451056    -1.37e-16    29.74536    1.2441859    0.0254
GW    38    17    -1.37e-16    30.99536    -4.962684    -1.37e-16    30.99536    1.2441859    0.0254
GW    39    17    -1.37e-16    29.74536    -4.962684    -1.37e-16    29.74536    1.2441859    0.0254
GW    56    19    0    40.5    30.5    0    40.5    -27    0.5
GW    57    5    0    20.5    30.5    0    40.5    30.5    0.5
GW    58    5    0    20.5    -27    0    40.5    -27    0.5
GW    59    13    0    -20    30.5    0    20.5    30.5    0.5
GW    60    13    0    -20    -27    0    20.5    -27    0.5
GW    61    19    0    -20    30.5    0    -20    -27    0.5
GW    62    5    0    -40    30.5    0    -20    30.5    0.5
GW    63    5    0    -40    -27    0    -20    -27    0.5
GW    108    19    0    20.5    30.5    0    20.5    -27    0.5
GW    109    19    0    -40    30.5    0    -40    -27    0.5
GS    0    0    0.0254
GE    0
LD    5    0    0    0    1.67e7
GN    -1
EK
EX    0    1    2    0    1    0    0
FR    0    36    0    0    174    1
RP    0    1    73    1510    90    0    1    5    0    0
EN

Otherwise antenna look pretty good, for your purposes. It may even have enough gain, in the UHF band, to receive the channels that you want. You will just have to try it, to see how well it works. Since your situation is getting most of your reception from reflected signals, it's hard to know, until you build it and see.

 

[Lassar]

ljhavener thanks for the improved segmentation.

Didn't know about unusual blips, mean that segmentation is off.

Thanks.

 

[ljhavener]

Didn't know about unusual blips, mean that segmentation is off.

Unusual bumps/blips, on the different curves, are not always caused by improper segmentation. Often they indicate what I call an unstable or dimensional critical design. Some designs don't seem to be very critical, about how closely they follow the original design. Other seem to have dimensions, that create real problems, if they aren't built exactly as designed. It looks like the bump, in your model, was a result of improper segmentation.

I usually use autoseg while I'm working on a design, and then double check things, with some experimentation with different manual segmentation, Your not trying to get better results, when you use manual segmentation. Your actually trying to see how stable your design is. Same results, with different segmentation, usually show that the design is stable. Manual Segmentation is sometimes required to eliminate errors. It's still important to understand what proper segmentation looks like. Usually the goal is to have all segments as close to the same length, without causing errors.

 

[Lassar]

Redid the vhf antenna in right frame.

Increased gain & improved symbols so never ever have to worry the optimizer
crossing bow ties.

Modeled UHF Gain,swr & VHF gain,swr from right frame of window frame.

UHF Gain: 6.55 to 11.82 db, Swr 4.22 to 1.59
VHF Gain: 5.83 to 6.58 to 6.22 db, Swr 5.81 to 1.47 to 3.57


4Nec2 image of antenna

FF4 VHF & UHF in windows frame Nec code:

CM Vhf & Uhf ff4 antenna: 
CM Modeled UHF Gain,swr & VHF gain,swr from right frame of window frame
CM UHF Gain: 6.55 to 11.82 db, Swr 4.22 to 1.59
CM VHF Gain: 5.83 to 6.58 to 6.22 db, Swr 5.81 to 1.47 to 3.57 
CM No Auto Segmentation
CE
'SY Rsrc=0.0305    ' 539 mhz SOURCE wire Radius.
SY Rsrc=.040905    '201 mhz SOURCE wire Radius.
SY Rbow=0.0404    'Radius (in inches) of BOWTIE elements
SY Rfeed=0.0254    'FEEDLINE wire Radius (in case they're different)
SY AngleInr=38.31663    ' Angle = half of the flare Angle in degrees
SY AngleOut=8.975229    ' Angle = half of the flare Angle in degrees
SY YDist=8.69112
SY BowLenI=YDist/COS(AngleInr)    ' Bow Half-Length Inner(plus some in bend) - Assume all SAME
SY BowLenO=YDist/COS(AngleOut)    'Bow Half-Length - Assume all SAME (Reality +/- 0.25+ in)
SY BowSepI= 2 * BowLenI * SIN(AngleInr)        ' INNER Bow Tine Separation - Assume all SAME
SY BowSepO= 2 * BowLenO * SIN(AngleOut)        ' OUTER Bow Tine Separation - Assume all SAME
SY ZBowII=21.13947    'Distance between the Centers of the two INNER bowties
SY BowSepDist=0.5
SY ZBowOI= BowSepDist + (BowSepI + BowSepO)/2'From Center of INNER bowtie to Center of OUTER bowtie
SY VertFram=1.5    '1.605063
SY Horz=30.5    '8

SY FeedSep=1.25    'Separation (in inches) between two FEEDLINE wires
SY Hop=1.25    'Separation between Feedlines at Crossover
SY Cond=1.67e7    'Conductivity (Copper=3.0e7, Alum=2.0e7, StainlessSteel=1.67e7)
' Calculated from above INPUT Values:
SY ZBowInr=ZBowII/2    'Distance from antenna center to center of INNER bowtie
SY ZBowOut=ZBowII/2+ZBowOI    'Distance from antenna center to center of OUTER bowtie
SY Z1=ZBowOut+BowSepO/2
SY Z2=ZBowOut
SY Z3=ZBowOut-BowSepO/2
SY Z4=ZBowOut -.875    'Very long crossover region
SY Z5=(ZBowII + ZBowOI)/2
SY Z6=ZBowInr +.875    'Very long crossover region
SY Z7=ZBowInr+BowSepI/2
SY Z8=ZBowInr
SY Z9=ZBowInr-BowSepI/2
SY YBowInr=FeedSep/2 + BowLenI * COS(AngleInr)' Ymax for Inner Bowties
SY YBowOut=FeedSep/2 + BowLenO * COS(AngleOut)' Ymax for Outer Bowties
SY YBowN=-FeedSep/2
SY YBowP=FeedSep/2
'  #    segs    X1      Y1    Z1    X2      Y2        Z2    radius
' SIMULATED BALUN SOURCE ON GW1:
GW    1    3    0    YBowN+Horz    VertFram    0    YBowP+Horz    VertFram    Rsrc
' GW2 Not used
' GW3 Not used
' INNER BOWTIES:
GW    4    11    0    YBowInr+Horz    Z7+VertFram        0    YBowP+Horz        Z8+VertFram        Rbow
GW    5    11    0    YBowInr+Horz    Z9+VertFram        0    YBowP+Horz        Z8+VertFram        Rbow
GW    6    11    0    YBowN+Horz        Z8+VertFram        0    -YBowInr+Horz    Z7+VertFram        Rbow
GW    7    11    0    YBowN+Horz        Z8+VertFram        0    -YBowInr+Horz    Z9+VertFram        Rbow
GW    8    11    0    YBowInr+Horz    -Z7+VertFram    0    YBowP+Horz        -Z8+VertFram    Rbow
GW    9    11    0    YBowInr+Horz    -Z9+VertFram    0    YBowP+Horz        -Z8+VertFram    Rbow
GW    10    11    0    YBowN+Horz        -Z8+VertFram    0    -YBowInr+Horz    -Z7+VertFram    Rbow
GW    11    11    0    YBowN+Horz        -Z8+VertFram    0    -YBowInr+Horz    -Z9+VertFram    Rbow
' OUTER BOWTIES:
GW    12    11    0    YBowOut+Horz    Z1+VertFram        0    YBowP+Horz        Z2+VertFram        Rbow
GW    13    11    0    YBowOut+Horz    Z3+VertFram        0    YBowP+Horz        Z2+VertFram        Rbow
GW    14    11    0    YBowN+Horz        Z2+VertFram        0    -YBowOut+Horz    Z1+VertFram        Rbow
GW    15    11    0    YBowN+Horz        Z2+VertFram        0    -YBowOut+Horz    Z3+VertFram        Rbow
GW    16    11    0    YBowOut+Horz    -Z1+VertFram    0    YBowP+Horz        -Z2+VertFram    Rbow
GW    17    11    0    YBowOut+Horz    -Z3+VertFram    0    YBowP+Horz        -Z2+VertFram    Rbow
GW    18    11    0    YBowN+Horz        -Z2+VertFram    0    -YBowOut+Horz    -Z1+VertFram    Rbow
GW    19    11    0    YBowN+Horz        -Z2+VertFram    0    -YBowOut+Horz    -Z3+VertFram    Rbow
' CROSS-OVER FEEDLINE:
GW    20    1    0    YBowP+Horz        Z2+VertFram        0    YBowP+Horz    Z4+VertFram    Rfeed
GW    21    1    0    YBowN+Horz        Z2+VertFram        0    YBowN+Horz    Z4+VertFram    Rfeed
GW    22    1    0    YBowP+Horz        Z6+VertFram        0    YBowP+Horz    Z8+VertFram    Rfeed
GW    23    1    0    YBowN+Horz        Z6+VertFram        0    YBowN+Horz    Z8+VertFram    Rfeed
GW    24    5    0    YBowN+Horz    Z6+VertFram    Hop/2    Horz    Z5+VertFram    Rfeed
GW    25    5    0    YBowP+Horz    Z4+VertFram    Hop/2    Horz    Z5+VertFram    Rfeed
GW    26    5    0    YBowP+Horz    Z6+VertFram    -Hop/2    Horz    Z5+VertFram    Rfeed
GW    27    5    0    YBowN+Horz    Z4+VertFram    -Hop/2    Horz    Z5+VertFram    Rfeed
GW    28    1    0    YBowP+Horz        -Z2+VertFram    0    YBowP+Horz    -Z4+VertFram    Rfeed
GW    29    1    0    YBowN+Horz        -Z2+VertFram    0    YBowN+Horz    -Z4+VertFram    Rfeed
GW    30    1    0    YBowP+Horz        -Z6+VertFram    0    YBowP+Horz    -Z8+VertFram    Rfeed
GW    31    1    0    YBowN+Horz        -Z6+VertFram    0    YBowN+Horz    -Z8+VertFram    Rfeed
GW    32    5    0    YBowN+Horz        -Z6+VertFram    Hop/2    Horz    -Z5+VertFram    Rfeed
GW    33    5    0    YBowP+Horz        -Z4+VertFram    Hop/2    Horz    -Z5+VertFram    Rfeed
GW    34    5    0    YBowP+Horz        -Z6+VertFram    -Hop/2    Horz    -Z5+VertFram    Rfeed
GW    35    5    0    YBowN+Horz        -Z4+VertFram    -Hop/2    Horz    -Z5+VertFram    Rfeed
GW    36    17    0    YBowP+Horz        Z8+VertFram        0    YBowP+Horz    VertFram    Rfeed
GW    37    17    0    YBowN+Horz        Z8+VertFram        0    YBowN+Horz    VertFram    Rfeed
GW    38    17    0    YBowP+Horz        -Z8+VertFram    0    YBowP+Horz    VertFram    Rfeed
GW    39    17    0    YBowN+Horz        -Z8+VertFram    0    YBowN+Horz    VertFram    Rfeed
' window frame
GW    56    19    0    40.5    30.5    0    40.5    -27    0.5
GW    57    5    0    20.5    30.5    0    40.5    30.5    0.5
GW    58    5    0    20.5    -27    0    40.5    -27    0.5
GW    59    13    0    -20    30.5    0    20.5    30.5    0.5
GW    60    13    0    -20    -27    0    20.5    -27    0.5
GW    61    19    0    -20    30.5    0    -20    -27    0.5
GW    62    5    0    -40    30.5    0    -20    30.5    0.5
GW    63    5    0    -40    -27    0    -20    -27    0.5
GW    108    19    0    20.5    30.5    0    20.5    -27    0.5
GW    109    19    0    -40    30.5    0    -40    -27    0.5

GS    0    0    0.0254
GE    0
LD    5    0    0    0    Cond    'Conductivity
GN    -1
EK
EX    0    1    2    0    1    0    0    0    'GW1 is SOURCE wire
FR    0    29    0    0    201    12
RP    0    1    73    1510    90    0    1    5    0    0
EN

Your window frame is probably different from from my window frame.

Symbols are included so you can modeled this antenna in your window frame.

Most important symbols for optimizing is:

ZBowII ---------------- ' Distance between the Centers of the two INNER bowties
BowSepDist --------- ' This is added in ZBowOI equation
AngleInr ------------- ' Angle = half of inner bow tie flare Angle in degrees
AngleOut ------------ ' Angle = half of outer flare Angle in degrees

The following two is not likely used in optimizer.

VertFram ------------ ' VertFram moves vertical position in frame
Horz ------------------ ' Horz moves horizontal position in frame

But used to move the antenna around in the frame.


Have fun building antennas!