eco32

thats how it is made:

Only few types of the antennas dont need a impedance adapters. The others will have a high loss. Do they have good results without this? The results will be adequate for the price.

Need more than 17dBi? You have to build antenna 10*Lambda boom, You nedd 20dBi than yo have to use Yagi with 20*lambda boom lenght, or try grid or parabola 10*lambda radius will give aprox. 30dBi

@Jeriyant: What is the impedance and did you use a balun?

https://www.youtube.com/@mul_onochannel1569/videos

No one did it with biquad

once again: Dipole has oposit phase on the arms, biquad has same phase on the both ends, trick with phase shiter will not work here.

Simple in mtlab:

The manufacturer touts that the antenna does not have sidelobes, I wonder whether conical corrugated horn or piramydal corrugatted horn is better, We have only this for 5180 - 6775MHz 24dBi:

update: It may be r movet to other topic Lna works better with filter - Quick and eassy tunable filter for a 2.4GHz, You can eaasy adat for You purpose (I dit biger, and can be tunable from 800MHz to 3.6GHz and 1.7dB in band attenuation) https://radio.g4hsk.co.uk/2020/01/04/qo-100-experiments-2400mhz-pipe-cap-filter/

https://radio.g4hsk.co.uk/2020/01/04/qo-100-experiments-2400mhz-pipe-cap-filter/

Yes, Thank You!!!, it looks like his cross biquad/biloop has 8dBi isted of 10dB from single biquod, without e-field chart it's hard to tell if it's circular polarization in this design there are no phase shifters. In my opinion it has linear polatisation. (I don't have to be right, maybe there is something going on there that I have no idea about) Just only for Example: S-band circularly polarized crossed dipole antenna for automotive applications

In 5GHZ Wifi projects once i saw this twisted construction (I do not know what the reason was, possibly to save space, but maybe something else, I am not able to simulate it yet. But I will make a prototype for measurements) Thats "normal" biquad and "twisted" biqiad: Other example of biquod (it's not good to follow him this time), of cours it can not work simultaneously, and MDF as isolator is bad idea. I think he said something about how this antenna will work in circular polarization. He did not show the chart from the analyzer. "In this video I show you how to make a biquad antenna that works in the horizontal and vertical simultaneously. This can be of benefit if tracking a constantly shifting object such as a quadcopter. It is also important to note that although the elements in this build are circular (one full wavelength) the biquad still propagates as a linear polarized antenna."

Add to previous post: I know that it is possible with dipoles, because there is an opposition phase on the "arms", I have no idea how to do it with a biquad, it has same phase on opostit corners

Thats the biqaod, is there an chance to achive circular polarisation with two biqoad or biloop antenas using only phase shifter? (two biquads oriented at 90 degrees to each other)

10dBi in main direction, same a single dipole with corner reflector

two dilpes with corner reflector: Gain increases, but at the expense of side lobes, in some applications this is unacceptable details: Yagi feed is reversed and it has two reflectors side lobes: how it looks in "normal mode:, feed litle yagi was not reversed: design: patern

Matlab (not yet able to use CST)

Simple design with a corner reflector. 14dB, 10dB in the main direction, with additional work with the elements, you can probably improve the main beam. The structure is similar to my latest grid (17dBi), but simpler. Important detail : standard model feed was changed to revers direction of radiation - director is Reflectors and reflector is director. Useful when you don't want to build a parabola

Lets continnue long hi gain Yagi for a 1296MHZ (it may by scaled for LTE or WIFI), these publications look better than those I pasted earlier [1-5] [6] Randy, K9BCT he build Hybrid Biquod for EME, 2x200cm boom and 19dBi (extended version of biqoud hybrid Yagi DL7KM) https://www.dcarc.club/presentations/2019-03-05 High Gain 70CM Loop Fed Array and 23cm BiQuadYagi’s by K9BCT.pdf "47 element version (44 directors, 2 loop DE and reflector) has a version (44 directors, 2 loop DE and reflector) has a relatively impressive frontal pattern with over 19dbi relatively impressive frontal pattern with over 19dbi" other parameters: F/B, almost 34db. G=19.17 dBi TA=31.5 K Tloss=3.0 K=3.0 K G/T=+4.20 dB.. Impedance is 49.--0.162j ohms [7] - International Microwave Handbook - (I have only few pages, if someone has full book, please share before i will buy ) it looks like You can not achive more dBi than on this chart will let You. (BTW Antenna from [7] biqod hybrod Yagi 2x200cm boom 19dBi looks good

No, We all know it was stupid idea. (Bad shape) It is based on Pacyfic Grid 917x720 and 15cm deep 5.6GHz grid antenna symulation + Yagi Uda in revers - directors works likea rediators (This is not a good representation, Matlab has big limitations) 1296MHZ => 17.3dBi oryginal grid antenna https://www.cyberbajt.pl/produkt/350/pacific-grid-56-ghz28-dbi.html

Thank You! This will help me a lot

It looks like my 90cm quassi dish (grid from 5GHz grid antenna) with dipole feed with coaxial splited balun has biger gain ans smaller dimeters Looks like 17dBi gain in loop is a naive wish of the author. Let me try. I have CST studio for a short time, I don't know how to use yet. Please be kind and share this model, I will try to change the diameters of the elements and distances one by one

additional materials [4] A Parasitic End-Fire Array of Circular Loop Elements [5] Optimum Design of Yagi Array of Loop Optimum Design of Yagi Array of Loop.pdf A Parasitic End-Fire Array of.pdf

Vivaldi in progres, Im waiting for bigger drill I do not know completely what the result will be, I make from garbage.