A loop antenna with quasi‐two sources for circular polarisation
Abstract A novel method of exciting a circularly polarised (CP) loop antenna is proposed using the moment method. A horizontal square loop above the ground plane has two corners connected to a vertical, branched feedline with one source. First, the authors show the radiation characteristics of a ref...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2022-03-01
|
| Series: | Electronics Letters |
| Online Access: | https://doi.org/10.1049/ell2.12419 |
| Summary: | Abstract A novel method of exciting a circularly polarised (CP) loop antenna is proposed using the moment method. A horizontal square loop above the ground plane has two corners connected to a vertical, branched feedline with one source. First, the authors show the radiation characteristics of a reference antenna whose corners are excited with two sources having the same amplitudes and a phase difference of 90°. Next, we excite the loop corners with one source using the branched feedline. It is found that when the branch location along the feedline is selected, the antenna radiates a CP wave. The frequency responses of the antenna show that the 3 dB axial‐ratio bandwidth is 12%, where the gain is more than 7.3 dBi. The simulated results are verified with experimental ones. |
|---|---|
| ISSN: | 0013-5194 1350-911X |