The development of antenna arrays with miniaturization, ultra-wideband (UWB), high-gain, and low-scattering characteristics have attracted increasing attention. With the continuous escalation of information warfare, in the limited space of the combat platform, electronic systems with multiple functions need to be integrated to complete different tasks. The results verify the feasibility of improving the performance of antenna and the UWB low-scattering functionality. Furthermore, the array structure shows extremely low-observable capability, which is larger than 15 dB of the RCS reduction from 7.1 to 50 GHz with a ratio bandwidth of 7.0:1. Simulated and measured results show that the proposed low-scattering array has a 10-dB RCS reduction band ranging from 5 to 50 GHz at normal incidence for both polarizations. By loading an optimized Minkowski-shaped metasurface as the ground reflector, which combines the multielement phase cancellation (MEPC) and EM absorption technology, the 4 × 4 array realizes a low radar cross section (RCS) without the radiation performance degradation. The optimized element is fabricated and measured, the results demonstrate that the − 10 dB impedance bandwidth is 4.5–50 GHz with a ratio bandwidth ( f H/ f L) of 11.1:1, and the maximum gain at 35 GHz is 12.7 dBi, which are in good agreement with simulation. Periodic elliptical slots at the outer edges and a dielectric lens are utilized for antenna element to improve performances including miniaturized size, wide bandwidth, and high gain. ^ "Dual-orthogonal polarized Vivaldi Antenna for Ultra Wideband Applications".This paper presents a miniaturized ultra-wideband (UWB) antipodal Vivaldi antenna (AVA) array with low-scattering characteristics integrated a hybrid diffusive-absorptive metasurface.Proceedings of IEEE Antennas and Propagation Society International Symposium. "Characterization of Vivaldi antennas utilizing a microstrip-to-slotline transition" (PDF). "A palm tree antipodal Vivaldi antenna with exponential slot edge for improved radiation pattern". Gibson: The Vivaldi Aerial, 9th European Microwave Conference Proceedings, Brighton, 1979, p. 101–105. The MWEE collection of EM simulation benchmarks includes a Vivaldi antenna. This inexpensive Vivaldi antenna is etched upon a printed circuit board and fed with a soldered-on coaxial cable and SMA connector.Īdvantages of Vivaldi antennas are their broadband characteristics (suitable for ultra-wideband signals ), their easy manufacturing process using common methods for PCB production, and their easy impedance matching to the feeding line using microstrip line modeling methods. Printed circuit technology makes this type antenna cost effective at microwave frequencies exceeding 1 GHz. Vivaldi antennas are useful for any frequency, as all antennas are scalable in size for use at any frequency. If fed with 90-degree phase-shifted signals, orthogonal devices can transmit/receive circular-oriented electromagnetic waves. Vivaldi antennas can be made for linear polarized waves or – using two devices arranged in orthogonal direction – for transmitting / receiving both polarization orientations. From the open space area the energy reaches an exponentially tapered pattern via a symmetrical slot line.Ī one-piece sheet metal vivaldi antenna undergoing testing in an anechoic chamber The feeding line excites an open space via a microstrip line or coaxial cable, and may be terminated with a sector-shaped area or a direct coaxial connection. Pattern of a Vivaldi antenna, made from double-sided printed circuit board material A Vivaldi antenna or Vivaldi aerial or tapered slot antenna is a co-planar broadband- antenna, which can be made from a solid piece of sheet metal, a printed circuit board, or from a dielectric plate metalized on one or both sides.
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