Dual Circularly Polarized Patch Antenna with Improved Interport Isolation for S-Band Satellite Communication

Table 1

The comparison of isolation performance of presented antenna with previously reported bi-port, dual circularly polarized antennas.

Ref. designs	Peak isolation	−10 dB bandwidth
[1]	23 dB	Not stated
[3]	15.7 dB	Not stated
[10] (low band)	10 dB	∼150 MHz
[10] (high band)	∼27 dB	−
[11] (band 1)	Average isolation = 5.8 dB	380 MHz
[11] (band 2)	Average isolation = 5.0 dB	770 MHz
[12]	∼60 dB	399 MHz
[13]	≥15.2 dB	50 MHz
[14]	35 dB	200 MHz
[15]	45 dB	1500 MHz
[16]	50 dB	85 MHz
[17]	36 dB	1340 MHz
[18]	20 dB	300 MHz
[19]	20 dB	150 MHz
[20]	45 dB	80 MHz
[21]	25 dB	900 MHz
This work	72 dB	90 MHz