A Four-Layer Odd Function Symmetrical Dual-Polarization Equilateral Right Triangle Slot Printed Broadband Directional Antenna for Wireless Lab Measurement Applications

Table 4

Comparison of different antennas.

Refs.	Size (mm^3)	Bandwidth (BW/GHz)	Isolation (dB)	Peak gain (dBi)	Dual polar	Extra feeding network	Materials
This work	150 × 150 × 62	135.5% (1.37∼7.12)	≦ −17	3.4–7	Yes	No	FR4
[9]	240 × 144 × 132	36.7% (0.69∼1), 47.3% (1.71∼2.77)	NA	4–6	No	No	Teflon
[10]	90 × 90 × 23	121.4% (2.69∼11)	≦ −28	3.9–10	Yes	Yes	Rohacell foam + FR4 + copper
[11]	160 × 160 × 1	55.9% (2.4∼4.26)	≦ −35	6–8.4	Yes	Yes	Rogers RT/duroid 5880
[12]	140 × 140 × 31.2	70% (1.5∼3.1)	≦ −35	7.2–9.5	Yes	Yes	FR4
[13]	70 × 70 × 20.5	91.8% (2.38∼6.42)	≦ −31	6.3–9.5	Yes	No	Rogers 4350
[15]	130 × 130 × 45	94.8% (0.91∼2.55)	≦ −20	4.5–8	Yes	No	Metallic plates

This work: VSWR ≦ 3; [9–13, 15]: VSWR ≦ 2.