Compact UWB Antenna Research Articles

A compact internal UWB antenna for wireless USB dongle application

AbstractThis article presents a compact internal ultra‐wideband antenna for wireless universal serial bus dongle application. The proposed antenna has a simple configuration and is easy to implement by bending a simple metal plate. To widen the impedance bandwidth, the proposed antenna has a vertical patch with a bevel structure and a horizontal patch with a narrow slit. The proposed antenna satisfies the 10‐dB return loss requirement over the frequency band of 2.9–10.85 GHz (7.95 GHz) and so easily covers the UWB band of 3.1–10.6 GHz. The effects of the system ground plane on the impedance matching of antenna are studied experimentally. The detailed design of the proposed antenna is described, and experimental results including radiation patterns and peak gains are presented. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 50: 1643–1646, 2008; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23468

Design of the Compact UWB Antenna With PI-shaped Matching Stub

In this paper, we have proposed a compact UWB antenna with PI-shaped (π-shaped) matching stub for UWB applications. The antenna has a modified trapezoidal radiating patch, a PI-shaped matching stub, CPW feeding, and two steps for impedance matching. A prototype antenna printed on the dielectric substrate of FR4 has dimensions of 20 mm by 20 mm. The proposed antenna exhibits a voltage standing wave ratio (VSWR) of less than 2.0, and the figure-of-eight radiation patterns with gain from 2 to 3.5 dBi in a frequency range from 3.1 to 10.6 GHz. To evaluate the dispersion performance of the designed UWB antenna, the path loss (|S21|) and the group delay are simulated and measured. Details of the proposed antenna design and the simulated and measured results are presented and discussed.

UWB Directive Triangular Patch Antenna

Compact directive UWB antennas are presented in this paper. We propose an optimization of the F-probe fed triangular patch antenna. The new design achieves an impedance bandwidth of69%(3–6.15 GHz) and presents good radiation characteristics over the whole impedance bandwidth. The average gain is 6.1 dB. A time-domain study has been performed to characterize the antenna behavior in case a UWB pulse is used. Finally, we propose an alternative solution to facilitate the manufacturing process using metallized foam technology. It also improves the robustness of the antenna as well as reducing its cost.

Making Quarter Wavelength Notch Antennas Wideband

Very compact yet e-cient UWB antennas are created by utilizing the ground plane as the antenna. There are notches in the ground plane, some to act as the coupling element(s), and some for optimizing the antenna bandwidth. The performance of the antennas compares favorably with wideband dipole designs occupying the same area.

Compact ultra-wideband planar serrated antenna with notch band ON/OFF control

The design and analysis of a compact planar UWB antenna with notch band ON/OFF control is presented. The UWB response is achieved by a microstrip fed staircase patch with an identical inverted ground plane. The notch band is switched ON or OFF by integrating a pin diode across a lambda/2 inverted `U' slot embedded in the patch