Table 1 Performance comparison among compact dual-polarized antennas.
Ref. | Size (\(\lambda\)) | No. of substrates | Feeding scheme | BW (%) | Isolation (dB) | Gain (dBi) | X-pol. (dB) |
|---|---|---|---|---|---|---|---|
0.26 \(\times\) 0.26 \(\times\) 0.06 | 3 | Transmission line | 6.0 | \(\ge\) 20 | 8.1 | \(\le\) \(-20\) | |
0.20 \(\times\) 0.20 \(\times\) 0.24 | 3 | Capacitive feed | 2.3 | \(\ge\) 30 | 5.7 | \(\le\) \(-20\) | |
0.19 \(\times\) 0.19 \(\times\) 0.03 | 1 | Direct | 1.0 | \(\ge\) 28 | 0.9 | \(\le\) \(-30\) | |
0.25 \(\times\) 0.25 \(\times\) 0.04 | 2 | Direct | 4.9 | \(\ge\) 20 | 4.9 | \(\le\) \(-30\) | |
0.19 \(\times\) 0.19 \(\times\) 0.07 | 2 | Direct | 3.1 | \(\ge\) 32 | 4.9 | \(\le\) \(-20\) | |
0.16 \(\times\) 0.16 \(\times\) 0.04 | 2 | Direct | 3.1 | \(\ge\) 35 | 4.3 | \(\le\) \(-20\) | |
Prop. | 0.18 \(\times\) 0.18 \(\times\) 0.03 | 1 | Direct | 1.6 | \(\ge\) 38 | 4.3 | \(\le\) \(-40\) |
