A Low-RCS Parabolic Reflector Antenna using Absorptive Frequency-Selective Reflector

Xu, Hanjing; Zhao, Xuankai; Li, Bo

doi:10.23919/aces-china52398.2021.9581547

Cited by 2 publications

(1 citation statement)

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“…On the other hand, antennas are required to be small in size and light in weight [4,5]. Therefore, when adopting RCS reduction methods such as antenna reflectors [6], AMC [7,8], and radome [9], the size of space loading should be considered to avoid space waste. The traditional miniaturization method is generally realized by means of unit twist, unit interdigital, loading metal vias, etc., but the complex process is easy to bring large performance errors.…”

Section: Introductionmentioning

confidence: 99%

A Low RCS and Array-Insensitive FSS Wideband Radome

Gong,

Zhang,

Wang

et al. 2023

Electronics

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In order to further expand the RCS reduction model of the miniature broadband antenna, a four-notch shaped FSS radome insensitive to the number of array elements is designed based on the multi-layered medium Green’s function and the transflective coefficient of the finite radome is derived. The calculated results are in good agreement with the infinite array, showing broadband transmission performance in both C-band and X-band. The electric field distribution and far-field distribution of a finite FSS array are given and the effects of a 5 × 5 array in a V-shaped structure on the surface of a miniature broadband antenna on its gain coefficient and RCS reduction characteristics are calculated numerically. The results show that the designed radome exhibits good array element insensitivity and far-field scattering reduction characteristics and achieves significant in-band and out-of-band RCS accurate reduction under the premise of constant antenna radiation performance. At normal incidence, the single-station RCS in the passband and stopband are as low as −35 dB and −32.66 dB, respectively. The maximum reduction in the transmission band reaches 20.96 dB under oblique incidence and the projection size of the radome decreases with the increase in the bottom angle of the radome but the RSC reduction performance is basically unaffected and can be adjusted flexibly according to actual needs. The above results provide a theoretical basis and technical support for the application of FSS radome in RCS reduction in micro wideband antennas.

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