Compact CPW‐fed ultra‐wideband printed antennas with controllable notch characteristics

Abstract

In this paper, a series of compact and miniaturized UWB‐printed antennas with a controllable notch function are proposed. The CPW structure is adopted to feed the proposed antenna, where the overall dimension is as compact as 15 mm × 15 mm × 0.5 mm. From 2.8GHz to 12GHz, the antennas proposed have a superior performance with approximate 2:1 VSWR, except the rejection frequency band. In addition, the main feature of the proposed antennas are their controllable notch frequency, notch amplitude, and notch orders, which are determined by the size of the circular U‐shaped slit, the position of the connecting line, and the number of slits, respectively. Moreover, the measured results are in reasonably good with the simulated results.

Coplanar waveguide‐based ultra‐wide band antenna with switchable filtering of WiMAX 3.5 GHz and WLAN 5 GHz signals

“…Reconfiguration using idealized switches has been initially proposed in Refs. , while in Refs. real switches PIN diodes are used to reconfigure the notch.…”

A Compact UWB Antenna with Independently Controllable Notch Bands

“…In [24], a dual-notched band antenna was presented with controllable rejected bands. In [25], a controllable single rejected band was achieved in a UWB antenna with different notched frequencies and notch amplitude choices. The antennas discussed in the literature have good notch characteristics and compact sizes, but they do not allow for independent adjustment of multiple notches.…”