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,,,the feed point is not positioned there...!!!!

,,,for Clanon... PAGODA.stl

Technical specification for manufacture of powerful antennas and high gain exclusively for FPV needs was consistent with the known Scientific-Production Center. The centre has a serious scientific potential, SOOOOO expensive equipment, modern production base and its patented production technology. The guys have been designing and manufacturing aerials for over 15 years and know about antennas just about anything, have experience of working with domestic manufacturers of UAV, FPV, therefore, subject them in part familiar and in this respect they have certain practices. Just what we needed: 1) Create an antenna that would have a large gain, comparable with the antenna "Yagi" in the popular FPV range 1160-1280Mhz. 2) To the antenna form factor was close to a patch antenna (for ease of placement on a tripod) 3) had an adequate angle of orientation, eliminating the need to use the rotary system for tracking the model at long distances Antenna gain from a 14.7 dB at the extreme frequencies of the range 1160Mhz 1280Mhz. Not difficult to guess that the gain in the middle of this range is significantly higher (the guys understand the task "literally"). This reinforcement is "not theoretical" and measured on real devices, on average, it in two times better than any patch. 2) the Antenna has dimensions of 400х400х25мм (including the case) 3) the Angle of orientation of the antenna about 40 degrees, which is not bad. Specifications : The most effective frequency range: 1160-1280Mhz The gain in the effective frequency range: 14,7 dB VSWR: less than 1.5 Polarization: linear vertical The radiation pattern Vert/Horiz: 40/40 degrees Input impedance: 50 Ohm Connector: N-type "mother" Weight: 2kg As we can see, the antenna is a... rather strange design four groups oval active elements. Between them the special material. The reflector is a metal substrate, the active elements in each group, TWO(!!!) (instead of one in the classic patch).

I think you should put an SMA connector instead of the discrete port - that might be the mistake....!!!

Cheap High Power Wifi Usb Adapter Sinmax SI-7300NA Sky Wireless Antenna Signal Long Range Wifi Adapter 30dbi High Gain Wholesale. Single frequency (2.4-2.4835GHz) Inside antenna...

,,,this is the real gain of this antenna(without Wifi Adapter)...

Then the mistake is somewhere else(on 3D Model)...!!!

Ground Plain is missing

You can put the CST-file...??

,,,like this...

In this paper, we design and analyze a dual-band rectangular patch antenna with slotted patch,patch and ground plane for 2.5 GHz and 5.2 GHz communications.

,,,,and this would be a wider band antenna with overall dimensions of 240x240 mm

,,,,yes, there are many types of antennas here...https://qsl.net/va3iul/Antenna/Printed_and_Microstrip_Antennas/Design_Ideas_for_Printed_and_Microstrip_Antennas.htm

,,,maybe 1800-2100 MHz...!!!

,,,you can try it...??

,,,take it... stella-5.cst

I took over the redesign of this antenna and I came up with this version...

,,,the antenna looks very good but it would be interesting to see its feed points (inside)...!!!

The high quality Patch antenna for 5.8GHz receiver. Can increase the range of 5.8GHz transmitter This 5.8GHz Right-Hand (RHCP) Circular Polarized patch antenna was custom-designed for the FPV market. Light enough to be mounted directly onto an FPV headset including the FatShark Goggle system or Uno and Duo FPV receivers. With a much wider beam than it's 13dBi cousin, it easily has double the range of a standard SpiroNET Omni antenna. Specs: Circular Polarization: Right-Hand Band: 5.8GHz ISM Gain: 8dBi Beam width: -3dB at +/- 45 degrees (H + V) (90 degree total) F/B Ratio: >356dB VSWR: < 1:1.35 at 5800MHz Impedance: 50 ohms Weight: 7g

,,,it is easier to solder a coaxial cable to the feed point...!!!

,,,take this... sputnik1400.cst

,,,but this antenna does not have the 1200-1600 MHz band..!!! ,,,this is what the antenna you want should look like...!!!

,,,for this frequency range it still seems like a big antenna to me...!!!!