ananth
Advanced Member level 4
patch antenna radiation pattern
Hello everyone,
I'm trying to design a patch antenna with an air dielectric for a bandwidth of 500 MHz in the 3.5 GHz range. The antenna resonates at 3.8 GHz but its not matched yet.
The radiation patterns are attached with this email. As you can see, there is a pronounced tilt in the elevation pattern of the antenna in one direction that I'm not able to fathom.
I've had the same problem with a wideband square patch antenna as well. What I don't understand is the non symmetry of the pattern when the structure is totally symmetrical.
As you can see in the attachment, its a circular patch antenna with a parasitic element on top. The parasitic element serves the purpose of increasing the bandwidth. I've tried removing the parasitic element but the antenna pattern is the exact same even then. Its being fed by a transmission line (The antenna is not matched).
Anybody got any ideas as to why this is happening?
Would appreciate any insights.
Ananth.
Hello everyone,
I'm trying to design a patch antenna with an air dielectric for a bandwidth of 500 MHz in the 3.5 GHz range. The antenna resonates at 3.8 GHz but its not matched yet.
The radiation patterns are attached with this email. As you can see, there is a pronounced tilt in the elevation pattern of the antenna in one direction that I'm not able to fathom.
I've had the same problem with a wideband square patch antenna as well. What I don't understand is the non symmetry of the pattern when the structure is totally symmetrical.
As you can see in the attachment, its a circular patch antenna with a parasitic element on top. The parasitic element serves the purpose of increasing the bandwidth. I've tried removing the parasitic element but the antenna pattern is the exact same even then. Its being fed by a transmission line (The antenna is not matched).
Anybody got any ideas as to why this is happening?
Would appreciate any insights.
Ananth.