A compact high-power antenna for ultrawideband nanosecond bipolar pulse

Abstract

In this article, the design procedures and radiation characteristics of a compact high‐power antenna are discussed. The antenna is designed to efficiently radiate a high‐power ultrawideband nanosecond bipolar pulse. The fabricated antenna realizes directive radiation and a wide bandwidth of 0.2–3.44 GHz (17.2:1) with dimensions of 300 × 300 × 260 mm3 (width × height × length). The measured far‐voltage is 4.2 kV when the antenna is excited by a 2.5 kV amplitude bipolar pulse with a 1.3 nanosecond pulse width. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1296–1301, 2015

Analysis of transient radiation pattern of a high‐power bipolar short‐pulsed array antenna

“…The lowest and highest operational frequencies of the antenna in Fig. 5 are 0.2 and 3.44 GHz, which correspond to the wavelengths of 1.5 m (λ L ) and 0.087 m (λ H ), respectively [15]. When d y is 1.5 m, it corresponds to the 1 λ L and 17.24 λ H , respectively.…”

“…When the V f,array (θ, ϕ) is calculated, the V f (θ, ϕ) of the compact high-power bipolar short-pulse radiator in Fig. 5a is used as V f,EP (θ, ϕ), which was proposed in our previous work [15]. The dimension and bandwidth (VSWR < 2) of the antenna are 0.3 × 0.3 × 0.26 m 3 and from 0.2 to 3.44 GHz, respectively.…”

“…5b and c, respectively. The frequency-domain (F-domain) radiation patterns of the antenna can be found in [15].…”

A compact ultra‐wideband transverse electromagnetic mode horn antenna for high power microwave applications

“…The radiation pattern of the HPM antenna should be symmetric along the propagation axis with minimum cross‐polarization and side‐lobe level should be minimum 5 . An HPM antenna with a bipolar pulse (nanosecond), is reported in, 6 which provides wide bandwidth and directive radiation pattern. Hence, this paper aims at designing a compact HPM antenna capable to transmit ultra‐wideband pulse signal with high gain without electric breakdown.…”

“…Balun can be designed to enhance the impedance characteristic of the antenna, as mentioned in 11 . The horn antenna is reported in 6 for electromagnetic compatibility measurement and broadband communication systems. A horn antenna with curve or bend edges in the aperture is reported in, 12 which reduces side lobs and provides a directive radiation pattern.…”