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The feed offset parabolic antenna KIP9-1700/2700DP MIMO 2x2 is designed for use with 3G/4G/WiFi modems and routers. The radiator supports standards LTE1800, UMTS2100, LTE2600 and WiFi(2.4 GHz) 802.11 b/g/PS 2x2 MIMO in the frequency range of 1700-2700 MHz. If you have a 4G modem, and Internet speed and signal strength are not satisfied, then the use of bundles 4G irradiator plate surely will boost the signal. Because of MIMO standard doubles the bandwidth of the channel. Amplification up to 35 dB. Antennas-characteristics : Operating frequency range, MHz 1700-2700 Antenna gain, dB 8-9 SWR in the operating frequency range, max. 1.5 Polarisation Linear Input impedance, Ohms 50 Maximum input power, W 10 Connector F- female N- female Permissible wind load, m / s 30 Operating temperature range, oC -40 … +50 Maximum permissible air humidity, % 100 Crosspolarization decoupling not less than, dB 30 Communication Standard WiFi 2400 ;LTE 2600 ;UMTS 2100; LTE 1800; Multi-band Mounting type on the pipe Execution type irradiator MIMO and inside...

In this tutorial you will learn how to simulate antenna devices in CST-Studio...https://space.mit.edu/RADIO/CST_online/mergedProjects/EXP_HF/examplesoverview/patch_antenna.htm

ECO, THE IMAGES ARE NOT VISIBLE...!!! "For how big the reflector is, the antenna gain is not that great."

I finally managed to do a simulation with this antenna....

A new small, low-profile and light-weight helical antenna element was designed for 2,1-2,4GHz-band communications. The novelty of the antenna is that its input impedance matching has been improved by adjusting the copper strip matching stub, while its circular polarization performance has been enhanced by changing the parasitic radiation patch loaded in the front of the antenna.

Model wireless network USB adapter TL-WN721N Lite N series supports IEEE 802.11 g and IEEE 802.11 b. It works great with all devices of the standards 802.11 b/g/n. An automatic detection of speed allows the wireless network USB adapter TL-WN721N to transfer data at high speeds (maximum capacity to 150Мбит/s).

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

,,,for Clanon... PAGODA.stl

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...??

,,,dumser2,take it your desire...!!! 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)...!!!