eco32

biquad or "double square" is also called "антенна Харченко" and searching for this name in google opens the gates of hell!

"From R-409, on a common reflector there are two antennas, one larger 120-240 MHz gain 9 dB, four smaller 240-480 MHz gain 13 dB."

what a biquad? It look like a "mother" of all biquads, wild dualband antena , from the propostion il look like it is for ~ 106MHz 500Mhz. (this design may be suitable for LTE420, LTE450 + Tetra and other trunkng systems VHF+UHF)

This shape was much closer to Metal form for muffins, but not able in matlab sa Antenna Array. Matlab has big limitations, I wrote earlier that this is a very approximate model. I don't have the ability to do it more accurately.

household stores is my favorit design mathod. Quick simulation with a very approximate model 27...30dBi. summing/phasing the signal is difficult in this band.

How it works: I will try 1296Mhz and 432.2MHz

What is the best technique for cutting out the discs? I will the HSS bimetal hole saw, holed in timber frame eng_pl_DEDRA-08WZ01-8PCS-BIMETAL-HOLE-SAW-SET-9546_1[1].webp

A simple dipole is no longer a simple dipole, what we have here is a dipole feed with a stumb balun. Alternative to the "splited coaxial balun (with a gap)" (may it be added to other topic, source: facebook)

Corner dipole calculator https://3g-aerial.biz/en/online-calculations/antenna-calculations/corner-reflector-antenna-online-calculator I got 10.2 dBi in Matlab

Solution rarely used, reduces sidelobs, separates from interfering signals, should not affect VSWR, may narrow main beam. Do you use or have seen this?

A very old design from the time when there was no access to VNA or simulation programs. I'm not sure if this design makes sense, but it looks cruel (purpose TV broadcast)

Actually ..... it is a biquad, very modified and more wideband.

I did mistake, it is stub balun not a stubm balun

This is an interesting and surprising design - Tuning directores positions process looks terrible, so much elements and only 14dBi. @Admin, Your version of the biquaod was better. Now we know that this is a dead end road and that it doesn't work.

Thats stubm balun, it may be directed downward or upward, I have no idea what the difference in operation is. Only klow that is to phase shift. (My version in previous page was tunable)

How is it made? i know coaxial COCO only : (reasembling 1800MHz antenna to 1296MHz

1296MHz, previous tests have shown that the antenna also works on the higher bands. I will take two on the VNA and do an S12 between them, then we will know what it looks like. 6xbiqod project has name "MATHYLDE"

Balun has also possibilites be a filter, I wants to do it this way. (it is possible that in the middle of the gap there should be a short circuit to ground on one side)

a)New aproach, converting biquad to biloop, not tested yet quick and careless soldering b)Four biqads for array, eventually there will be six (I have 1:6 powe combiner, thats why six)

thats ~20dBi 920mmx740mm 1296MHz, adequat Yagi will have 4m boom other pictures: https://www.wifi-antennas.com/topic/102-simple-dipole-antenna/?page=2#comment-20589 thats good?

920 cm pacyfic grid atenna with dipole (with coaxial splited balun and one reflector) wil gove You 19-22dBi, adequat Yagi will be 2m long and and should be carried out with great precision (+/- 0.1mm) add: thats the solution from Slovakia

from documents:"Wideband quasi‐Yagi antenna with stable radiation patterns for base‐station applications" and "A Novel Wideband Quasi-Yagi Antenna for Base-station Applications" > simulated gain ranges from 8.0 dBi to 9.8 dBi in the operating band. that is same gain as in simple biquad but a simpler design.

@Admin {,,,this construction is a bit wrong, mcNeill doesn't really do good things...!!!} McNeil, He performs titanic antsy work in making phantoms, but do not fully understand it, for example, phase shifters are called load coil, and so on and so on... {,,,on this forum there is such a dipole in the correct construction...!!!!} HAMs do not know it, I have not yet seen any HAMs construction with the use of this type of matcher/balun. Most popular is this one: This is material for a separate topic, LTE/Wifi antennas rarely have a balun.

Thank You, colecting materials ongoing.

@Admin This is amazing, this ring makes no obfuscation effect. The feed on the 1296MHz is usually large, and here it works as in an ofset antenna. I have not seen such a design before. BTW, Are You doing EME?