Multibeam Bidirectional Wideband/Wide-Scanning-Angle Holographic Leaky-Wave Antenna

Pan

et al. 2022

IEEE Access

Section: Introductionmentioning

confidence: 99%

“…In this paper, a beam-changeable concentric annular LWA array is proposed. Comparing to the multi-beam antennas in [1][2][3][4][5][6][7][8]16,17] which mostly provides only directive switchable beams, this work generates multi-beams including directive beam, omnidirectional beam and synthetic beam. This adapts to more coverage demands.…”

Section: Introductionmentioning

confidence: 99%

Concentric Annular Leaky Wave Antenna Array and Its Application to Self-Sensing Smart Antenna for Radio Wave Coverage in 2-D Confined Spaces

Pan

et al. 2022

IEEE Access

“…However, it results in bidirectional multibeam pattern because of TE mode surface without metallic ground. On account of the theory of scalar and tensor holographic artificial impedance surfaces, the antennas also have the feature of polarization control 6 . A polarization‐reconfigurable broadside holographic antenna was studied, which could switch polarization states by utilizing four PIN diodes 7 .…”

Section: Introductionmentioning

confidence: 99%

“…Firstly, how to simplify the metasurface design. It is known that most of holographic antennas are fed by monopole antenna to excite the surface waves 4‐12 . However, surface wave on these metasurface is cylindrical‐wave, even if the beam‐tilt is achieved in one plane, two‐dimensional (2‐D) surface impedance should be calculated to compensate the phase front of the cylindrical surface wave 13 .…”

Section: Introductionmentioning

confidence: 99%

Metantenna design with one‐dimensional holographic concept

Liu

Int J RF Microw Comput Aided Eng

et al. 2021

In this paper, metasurface antenna (metantenna) with one‐dimensional holographic concept is proposed and an example of producing 50° radiation beam angle at 16 GHz is taken to certify the metantenna operating principle. We first introduce one‐dimensional holographic theory to simplify the metasurface design. By this means, compared with the traditional two‐dimensional metantenna, the integral structure has fewer unit cells, simpler structure and the beam‐tilt is achieved as well. Simultaneously, to feed the metasurface above efficiently, the tapered microstrip line is modified by adding a sloping metal strip as a plane‐wave surface wave launcher, thus obtaining a smooth transition from Quasi transverse electromagnetic wave to transverse magnetic wave and a broad frequency band of impendence matching. A prototype is fabricated and tested at last. The measured radiation beam angle is 49° at 16 GHz, which approximates to the desired beforehand. On the other hand, this metantenna has a beam scanning angle of 24° to 63° from 13 to 17.5 GHz. The gain is about 13 to 15 dBi and the half power beam width is about 9° in the above frequency range. It has features of stable high gain, narrow beamwidth and high radiation efficiency.

“…In modern wireless communication and detection systems, such as personal and vehicular communications, collision avoidance system, radar sensor and radar-tracking systems, dual-beam or multi-beam antennas are usually desired [17]. These antennas can transmit and receive signals to and from different directions simultaneously, which exhibit flexibility in communication with more objects simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Dual-Beam and Tri-Band SIW Leaky-Wave Antenna With Wide Beam Scanning Range Including Broadside Direction

Geng

et al. 2019

IEEE Access

In this letter, a novel dual-beam and tri-band leaky-wave antenna (LWA) based on substrate integrated waveguide (SIW) structure is proposed, which has the capability of wide beam scanning range including broadside direction. The antenna consists of two kinds of periodic structures which can excite two -1st spatial harmonic waves and result in two radiation beams simultaneously. Through theoretical dispersion diagram analysis of the unit cells of two periodic structures and by applying the techniques of impedance-matching and reflection-cancelling, the open-stopbands at broadside are suppressed. Then the main beam of the proposed LWA can scan from backward to forward through broadside when frequency changes. Moreover, a tri-band application can be achieved in the dual-beam antenna by optimization of the second periodic structure. The measured results validate that the proposed SIW LWA has three operating frequency bands. In band 1 from 8.6 to 9.2 GHz, there is one beam scanning from 42 • to 71 • in the forward, in band 2 from 10 to 12 GHz, there is one beam scanning from -40 • to 4 • in the backward, and in band 3 from 12.5 to 15 GHz, there is a dual-beam scanning from -55 • to 54 • including broadside direction, which show good agreements with the simulated results. Dual-beam, tri-band, open-stopband (OSB), leaky-wave antenna (LWA), substrate integrated waveguide (SIW). INDEX TERMS