Design a Multistub Array Antenna at 28 GHz with Beam Switching Ability

Table 4

Comparison of some beam steering.

Ref. Num.	Freq.(GHz)	Gain (dB)	Radiation at θ =	5G application	Size ()	Size reduction	Efficiency
[26]	6.59–6.69	9	Yes	No	1.5 × 11.58 × 0.205	86.2%	N.A
[27]	6.1–7.2	14–16	Yes	No	37 × 3.17 × 0.579	99.2%	65%
[28]	6.59–6.72	5	Yes	No	1.5 × 11.58 × 0.205	86.2%	N.A
[29]	6.2–6.8	7.1	Yes	No	0.21 × 9.34 × 0.748	66.66%	78.5%
[30]	27.5–28.5	8.01	Yes	Yes	5.6 × 12.6 × 0.074	90.6%	90%
[31]	25–27	10.5–12	Yes	Yes	8.41 × 3.73 × 0.35	95.5%	95.6%
[32]	28	11.62	Yes	Yes	7.55 × 7.55 × 0.22	96.1%	96.21%
This work	27–29.5	14.6	Yes	Yes	2.8 × 4.86 × 0.036	—	95%