Abstract
A compact CPW-fed ultra-wideband antenna with dual band-notch characteristic is presented. Two notched frequency bands are obtained by embedding two U-shaped slots in the radiation patch and a rectangle slot in the ground plane. The two notched bands can be controlled by adjusting the length of the responding slots. The proposed antenna is successfully simulated, fabricated and tested. Experimental and numerical antenna shows that the proposed antenna with compact size of 21×28mm2, has an impedance bandwidth range from 3.1GHz to more than 11.0GHz for voltage standing-wave ratio less than 2, expect two notch band frequency 5GHz-6GHz for WLAN and 7.7GHz-8.5GHz for X-band for satellite communications in China.
Highlights
With the development of the modern wireless communications, the ultra-wideband (UWB) systems have attached much attention recently because of its advantages including high speed data, small size, low cost, low complexity [1,2,3,4]
The entire above can implies that the proposed antenna has two rejection frequencies .The lower at 5-6GHz for WLAN is mainly determined by the rectangle slot and the higher at 7.7-8.5GHz for X-band is caused by the U-shaped slots and the distance between radiation patch and CPW ground (g)
The differences between the simulated and measured values may be due to the errors of the manufactured antenna and the SMA connector to CPW-fed transition, which is included in the measurements but not taken into account in the calculated results
Summary
With the development of the modern wireless communications, the ultra-wideband (UWB) systems have attached much attention recently because of its advantages including high speed data, small size, low cost, low complexity [1,2,3,4]. As the important part of the UWB systems, the antenna has received increased attention due to its impedance bandwidth, simple structure and omni-directional radiation pattern. Several narrow bandwidth systems have been used for a long time, such as WLAN (5-6GHz) and X-band (7.7-8.5GHz). A compact CPW-fed UWB antenna with dual band notch characteristic is investigated numerically and experimentally. By using two U-shaped slots in the radiation patch and an rectangle slot in the CPW ground, two band-notched frequency will be appeared, which reduce the potential interference. It is found that the designed antenna satisfies all the requirements in the UWB frequency band except 5-6GHz for WLAN and 7.7-8.5GHz for X-band. The article is divided as follows: Section II discusses the antenna model and the configuration; Section III gives the studies on the key parameters; Section IV shows the measured results of the VSWR, radiation pattern and the gain.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
