In this paper, methods for improving frequency selectivity in filter antennas by employing
controllable radiation nulls (RN) are reviewed. Radiation nulls in the Gain graph help in …

A single-layer filtering hybrid antenna with low profile and high selectivity is presented. The
proposed antenna is composed of a triangular patch and a substrate integrated waveguide …

In this article, a systematic method for designing antennas with quasi-isotropic patterns is
proposed based on pixel structures and-port networks. Multilayered pixel structures are …

The fifth generation (5G) mobile communication systems employ technologies such as
massive MIMO, millimeter-wave (mmWave), and ultra-dense networks to support higher …

An ultracompact broadside and backfire pattern-reconfigurable Huygens dipole antenna
(HDA) is developed, which achieves a quasi-isotropic and uniformly polarized radiation …

Internet of Things (IoT) devices require orientation insensitive communication and a small
footprint. Wireless communication should be maintained across the whole operation band …

In this article, a quasi-isotropic antenna with system ground plane is proposed for Internet of
Things (IoT)-based smart home applications. The proposed antenna consists of a system …

Radio-frequency identification (RFID) is a widely used technology for wireless data transfer
between tags and readers. Passive ultrahigh-frequency (uhf) RFID architecture is a …

An electrically small antenna (ESA) for a linearly polarized (LP) receiver with quasi-isotropic
coverage is developed and investigated by theoretical and experimental analyses. This …

A single-layer, electrically small, quasi-isotropic antenna with filtering response is developed
and experimentally investigated in this article. This electrically small antenna (ESA) …