Design of C/X dual band and dual circularly polarized shared-aperture microstrip antenna

Table 1. Dimensions of C/X band antenna element (mm)
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Table 1. Dimensions of C/X band antenna element (mm)
L_r1 L_r2 L_r3 L_p1 L_p2 L_p3 L_b1 L_b2 L_f
6.4 8.6 11 5.9 8.1 10.5 7.1 5.6 8.5
W_r1 W_r2 W_r3 W_p1 W_p2 W_p3 d_yc R_c R_v
3.4 2.8 2 2.8 2.6 1.8 15.2 0.6 1
W W₁ L_s W_s L_x W_x R_s
1.1 0.36 4 0.4 1.6 10.5 0.2

Table 2. Dimensions of antenna array (mm)
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Table 2. Dimensions of antenna array (mm)
h₁ h₂ h₃ h₄ h₅ h₆ h₇ h₈ L_s d_c d_X
0.5 1.5 0.5 1 2 0.5 2 0.5 100 40 23

Table 3. Comparison with other dual-band dual circularly polarized antennas

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Table 3. Comparison with other dual-band dual circularly polarized antennas

antennas	bands	polarization	impedance bandwidth/%	3 dB AR bandwidth/%	gain/dBi	aperture efficiency/%	size/λ₀
Ref [8]	X/Ku	RHCP/LHCP	8.3/18.9	14.2/14.9	17.5/18.3	52.2/31.8	2.25×2.25×0.02
Ref [9]	C/X	LHCP/RHCP	21.0/21.2	13.2/12.8	14.5/17.5	59.4/55.6	1.83×1.83×0.08
Ref [10]	S/C	RHCP/LHCP	20.4/12.6	16.6/5.7	1.9/1.3	−	0.30×0.30×0.01
this work	C/X	LHCP/RHCP; LHCP/RHCP	23.3/25.9; 28.6/28.7	17.7/19.0; 19.8/18.7	13.7/13.7; 12.3/12.9	57.6/57.6; 45.5/52.2	1.62×1.62×0.14

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Daibo Yao, Xuan Yang, Qinggong Guo. Design of C/X dual band and dual circularly polarized shared-aperture microstrip antenna[J]. High Power Laser and Particle Beams, 2023, 35(10): 103002

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