Theoretical and Experimental Comparison Results of Dual-Channel 3D Quasi-Optical Network System between Frequency Selective Surface and Wire Grid Polarizer

Table 3

The far-field results of 183 GHz channel.

Filter	Angle (degree)	Cross-polarization level			First side-lobe of copolarization amplitude
		Simulation	Near-to-far	Ideal QZ integral	Simulation	Near-to-far	Ideal QZ integral
FSS	Phi = 0	−22.26 dB	−18.71 dB	−22.83 dB	−55.27 dB	−32.48 dB	−33.56 dB
	Phi = 90	−21.87 dB	−22.47 dB	−20.58 dB	−45.75 dB	−34.85 dB	−34.32 dB
Polarizer	Phi = 0	−25.09 dB	−19.74 dB	−29.53 dB	−56.75 dB	−32.38 dB	−32.71 dB
	Phi = 90	−22.09 dB	−30.03 dB	−21.34 dB	−55.42 dB	−34.67 dB	−32.36 dB
Copper plate	Phi = 0	−21.89 dB	−17.96 dB	−22.32 dB	−60.19 dB	−40.37 dB	−41.8 dB
	Phi = 90	−22.12 dB	−20.57 dB	−21.47 dB	−50.19 dB	−40.15 dB	−35.2 dB
Aluminum plate	Phi = 0	−21.89 dB	−18.39 dB	−22.98 dB	−62.11 dB	−35.94 dB	−30.88 dB
	Phi = 90	−21.93 dB	−21.87 dB	−22.07 dB	−51.65 dB	−36.76 dB	−36.84 dB