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Hello,
I am looking for antennas for vehicule traking. In fact, the antennes will be stuck with magnetic under the vehicule. For GPS antenna (patch), there is no problem, i think, as it has his own ground plane but for GSM900 antenna, there is a problem. Indeed, to preserve a good S11, the...
thank you Sir for your reply, but the problem is that antenna should be omni and the Yagi antenna is directionnal. Secondly, the antenna should be realized on PCB so it is not possible to use High K substrate. Do you think sir that is it possible to load for example a Meander monopole so it will...
Hello,
I am looking for an antenna that works in VHF band (160 MHz). Indeed, i dismissed the helix solution because the size and i am looking for a printed solution? Is there someone who can advise me a solution?
Hello, At first, your antena is not a loop antenna, indeed it is a folded dipole with a t-match ( for match wit complex impedance).
When you simulate a antenna,you must to place vaccum at at least lambda/4 from all radiation surfaces.
Secondly, if you want to simulate radiation, you should...
Hi,
Indeed, it is normally that you find two different behavior. A loop antenna is used normally without a ground plane and if you put a ground plane close to antenna you will loss adaptation and radiation. if you want, draw the antenna in HFSS and i can check it for you if you want...
Hello govindram,
i advise you to use HFSS antenna design Kit. it is a software with HFSS that help you to automatically draw the antenna. You just should determine your frequency band and the antenna topology.
Normally the procedure to design an antenna with infinite ground using HFSS is the...
thx you for your helpful answer,
another thing please about simulation using HFSS, why in some case the return loss can be improved by matching the impedance of the port with the impedance of the antenna while in other cas, the return loss is unchanged (is missmatched) whatever is the impedance?
Hello,
Indeed, i am working on UHF tag antenna and i simulat them using HFSS simulator. For excitation, i put a 50 Ohm lumped port ( idont know if is it good or false) but what i have difficulty understanding how can i extract the internal impedance of the antenna. In another, mean, did the...
Hello,
thank your for your answer, i working more less on the same antenna, indeed if you want a small size, i advice you to design a meandered monopole. You could found many example in book "planar antennas for wireless communications" (kin-Lu wong")
If you want i have posted a three design for...
Hello and happy new year to all,
i am working on dual band antenna and i really did a big effort to found an dual band antenna that can meet specification. Indeed, i am looking for an antenna working on the band 824 to 960 MHz and 1710 to 1990 MHz. The real problem is the size because i am...
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