Ultra-Wideband <formula formulatype="inline"><tex Notation="TeX">$E$</tex></formula>-Plane Monopulse Antenna Using Vivaldi Antenna

Abstract

An ultra-wideband (UWB) E-plane monopulse antenna working in the frequency range from 3.1 GHz to 10.6 GHz is proposed. The UWB E-plane two-element array is constructed using Vivaldi antennas. By shortening the adjacent tapered lines of the two Vivaldi antennas and using corrugated edges, sum and difference characteristics of the array are improved. The UWB monopulse comparator is a multi-layer planar magic T consisting of an UWB 90°directional coupler and two UWB 45°phase shifters in series. By integrating the array and the comparator, the UWB E-plane monopulse antenna is designed and fabricated with the low-cost PCB process. In the frequency range from 3.1 GHz to 10.6 GHz, the sum gain is measured as more than 10.1 dBi, the sidelobe level less than -13.1 dB, and the null depth greater than 22.5 dB. The good sum and difference characteristics obtained make the proposed UWB E-plane monopulse antenna desirable for target detecting and tracking.Index Terms-UWB monopulse antenna, Vivaldi antenna, directional coupler, phase shifter. 0018-926X (c)

Triple-Radiation Pattern Monopulse Horn Feed With Compact Single-Layer Comparator Network

“…Moreover, in most of the other works obtaining a low cross polarization level at the φ = 45 • plane is not enforced. Only [34] presents a cross polarization result at the diagonal plane, which is indeed 2.4 dB better than the result obtained by the present work. However it should be emphasized that the design in [34] presents a single difference pattern and additionally the antenna is implemented at a much lower frequency, which significantly reduces the effect of the manufacturing tolerance.…”

“…1) presents distinctive characteristics regarding the feed architecture and its components, over other configurations in the state of the art [25], [31]- [38]. First, the feed produces a triple radiation pattern (sum, azimuthal difference and elevation difference patterns), while other works present just a sum and a single difference pattern [31]- [34], leading to relevant differences in the feeder architecture. In our work, this triple radiation pattern is achieved with a spline profile high-gain horn, connected by a mode converter to a very compact comparator network.…”

Simple Compact UWB Vivaldi Antenna Arrays for Breast Cancer Detection

“…Instead of adding a director to the Vivaldi antenna, its slot is doubled (DSVA) to enhance the BW and directivity [5,6]. For UWB, target detection, and high-speed 5G communication applications, BW and impedance matching improvement are achieved by etching slots on the proposed DSVAs' edges in [5,7,8]. Enhanced directivity and gain required for UWB imaging and radar systems are achieved in the proposed DSVAs in [9,10] by adding zero-index metamaterial (ZIM) unit cells and a parasitic element, respectively.…”

Monopulse Antenna Based on Singular Spoof Surface Plasmon Polariton Structure for Angle Measurement

“…Monopulse antennas configurations have been widely designed with array and multi-aperture schemes [10][11][12][13][14][15][16][17], which provide high gain of sum beam and deep radiating null in the detecting direction. Meanwhile, a feeding network with high complexity is required with the increase of element number [18][19][20].…”