Miniaturization of Quasi-Yagi Antenna Array with High Gain Using Split-Ring Resonators

Table 1

Comparison of the radiation performance of the proposed antenna array with SRRs and without SRRs.

	Element spacing	30 mm (SRRs/without SRRs)	40 mm (SRRs/without SRRs)	55 mm (without SRRs)
Inverse balun	S11 (dB)	−13.11/−8.81	−14.46/−9.14	−11.76
	Maximum gain (dBi)	11.77/9.75	13.32/11.32	11.15
Directional balun	S11 (dB)	−15.91/−13.52	−12.65/−2.71	−11.45
	Maximum gain (dBi)	12.14/7.1	12.96/0.17	13.08