Low‐profile and broadband microstrip antenna with pattern diversity

Abstract

This paper presents a low‐profile and broadband pattern diversity microstrip antenna with quasiperiodic radiating patches fed by two slots. The thickness of the whole design is only 0.044λ0 (λ0 is the free‐space wavelength of the center frequency), showing great potential in applications. The broadband property is realized by efficiently exciting TM10 mode and antiphase TM20 mode and forming two resonant frequencies in the target band. The antenna can generate a broadside or difference pattern by switching the input port of the broadband 180° hybrid coupling feed network. The measured results show that the coincident impedance bandwidth of the antenna working in the two pattern modes is 20.5% (3.20–3.93 GHz), and the maximum gain values are 6.85 dBi for the directional pattern and 5.80 dBi for the difference pattern.

Single Layer Metamaterial Superstrate for Gain Enhancement of A Microstrip Antenna Array

“…In contemporary wireless communication systems, the demand for high-performance antenna arrays is steadily increasing, driven by the need for faster data rates, broader coverage, and more reliable performance, particularly within the X-band frequency range; microstrip antenna arrays have become a prominent choice due to their compactness, low profile, compatibility with integrated circuit technologies, and ease of manufacture [1,2]. However, these antennas often face challenges in achieving optimal gain, wider bandwidth, and desired radiation characteristics, especially in environments characterized by multipath propagation, signal interference, and attenuation [3,4].…”