Low-Cost Nonuniform Metallic Lattice for Rectifying Aperture Near-Field of Electromagnetic Bandgap Resonator Antennas

Abstract

This paper addresses a critical issue, which has been overlooked, in relation to the design of Phase Correcting Structures (PCSs) for Electromagnetic Bandgap (EBG) Resonator Antennas (ERAs). All previously proposed PCSs for ERAs are made either using several expensive Radio Frequency (RF) dielectric laminates, or thick and heavy dielectric materials, contributing to very high fabrication cost, posing an industrial impediment to the application of ERAs. This paper presents a new industrialfriendly generation of PCS, in which dielectrics, known as the main cause of high manufacturing cost, are removed from the PCS configuration, introducing an All-Metallic PCS (AMPCS). Unlike existing PCSs, a hybrid topology of fully-metallic spatial phase shifters are developed for the AMPCS, resulting in an extremely lower prototyping cost as that of other state-of-theart substrate-based PCSs. The APMCS was fabricated using laser technology and tested with an ERA to verify its predicted performance. Results show that the phase uniformity of the ERA aperture has been remarkably improved, resulting in 8.4 dB improvement in the peak gain of the antenna and improved sidelobe levels (SLLs). The antenna system including APMCS has a peak gain of 19.42 dB with a 1-dB gain bandwidth of around 6%.

Hybrid frequency selective surface phase cancelation structure based broadband switchable radar cross section reduction

“…A FSS meta‐surface is used to reduce the RCS of a wideband circularly polarized fabry‐perot cavity antenna 25 . Phase‐correcting structures employing all‐dielectric materials 26,27 and all‐metal structures 28 have been used for phase‐error elimination. Recently artificial intelligence‐based approaches, such as particle swarm optimization 29‐31 have been used to design near‐field correction structures.…”

A Compact C-Band Bandpass Filter with an Adjustable Dual-Band Suitable for Satellite Communication Systems

“…Hence, the satellite communications industry has created a demand for low-mass narrowband low-loss filters with high selectivity [13][14][15]. As a result, affordability and compactness have become two critical requirements of microwave filters and other electromagnetic components used in the upcoming new generation of low-cost Satcom systems, where satellite communication-on-the-move will become a part of everyday life [12][13][14][15][16][17][18][19].…”

A Novel Frequency Selective Surface With Two Non-Interfering Passbands

“…Working as a spatial filter, traditional frequency selective surface (FSS) is constituted by an infinite array of metallic patterns printed on a dielectric substrate to control the transmission and reflection of an incident electromagnetic wave [1]. Additionally, it is reported that FSSs can be made of different materials, like all-dielectric materials [2], printed surfaces [3], or all metal structures [4]. Since natural materials do not possess the characteristic of frequency selectivity, FSS is also classified as the concept of metasurface by some scholars, which has gained a lot of attention over the past decade [5][6][7][8][9][10].…”