Design of Reconfigurable Bandwidth Filtering Antenna and Its Applications in IR/UWB System

Abstract

A reconfigurable bandwidth antenna for an impulse radio-UWB (IR/UWB) system design is illustrated in this paper. By adopting a continuously tunable low-pass filter by varactor at the feed of the antenna, the proposed antenna obtains a continuous tunable bandwidth from 1.02 GHz to 2.42 GHz. To ensure the identifiability of transmitted pulses in (IR-UWB) system, the antenna is analyzed in both frequency domain and time domain. The proposed antenna is valid with a system fidelity factor (SFF) above 0.8 while the bandwidth is tuning. The compact size, low cost, and tunable bandwidth with the identifiability of the transmitted pulse makes it suitable for UWB impulse radars to improve the utility ratio of frequency, and dynamic adjustment avoids interference of the IR-UWB in other communication frequency bands.

Bandwidth switchable MIMO antenna for automotive internet of things/ultra‐wideband communications

“…Unlike the research in ref. [13][14][15][16][17][18][19][20], the present research is tested for MIMO technology and promising results are obtained. 7.…”

“…Unlike the research reported in ref. [13][14][15][16][17][18][19][20][21], the proposed bandwidth switchable antenna works for the entire UWB band and the narrow band with high fractional bandwidth. 3.…”

“…The research in ref. [14][15][16][17][18][19] and [21] is tunable over a narrow frequency range. However, the present research provides switchable characteristics between 2 and 13.2 GHz and 2 and 3 GHz.…”

“…The proposed filtering antenna has a high-realized gain compared to the research presented in ref. [13][14][15][17][18][19]. The antenna in ref.…”

“…A filtering antenna with tunable upper transmission zero is reported in ref. [14] for IR-UWB applications covering 1.02-3.5 GHz. A bandwidth reconfigurable filtering antenna is reported in ref.…”