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The effects of EMP of different types and different energy will lead to different levels of damage in limiters employed in RF and microwave receivers. After damaged, the limiters still preserve some original functions and thus the systems they served will suffer performance degradation instead of invalidation. In this paper we made research on the damage threshold and damage effects of typical limiters,...
Limiters are a kind of important module to protect the front end from physical damage in the case of RF/microwave receivers are exposed to EMP radiation. However, typical PIN limiters employed in most RF receivers are faced with the conflict between power capability and limiting level. To solve the problem, we proposed in this paper a new design of limiter based on multistage PIN diodes and Shcottky...
In this paper, we made research on the radiation characteristics of IRA with analytical and simulation methods. According to the research results, IRAs exhibit excellent characteristic, as small VSWR at low frequency range, short oscillation time of radiation waveform, narrow main beam, high gain and ultra wide-band. Typical radiation pulse of IRA consists of two parts, namely, the pre-pulse, which...
In this paper, the time-domain field-to-circuit transfer characteristics of UWB TEM horn antenna were studied with analytical method and simulation method respectively. To obtain the electric flied waveform in the far-filed region of the TEM horn excited by any voltage sources, we could first get the coupled voltage waveform of the antenna illuminated by impulse-like incident plane wave by means of...
A type of composite metamaterials (CMMs) with unique configurations is demonstrated and the transmission properties performed in free space exhibit a pass band at about 8.5 GHz.Simulations with lateral displacement of Gaussian beam transmitted through parallelogram‐shaped medium are realized, which can demonstrate the negative refraction index. Further, transmission spectrum of wires alone, split...
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