Design of a new UWB‐integrated antenna filter with a rejected WLAN band at 5.8 GHz

Abstract

In this article, a new ultra‐wideband (UWB)‐integrated antenna‐filter notched at HiPerLAN 5.8 GHz frequency is presented. This antenna filter system is composed of a rectangular slot fed with a microstrip rectangular patch by coupling effect and cascaded with an UWB interdigital hairpin resonator filter. The proposed components, antenna and filter, are matched with 50 Ω, to allow an easier connection, with no need to add additional matching circuit. To improve the selectivity of the antenna filter system, two wide sections of microstrip line was inserted between the input/output feed lines and the interdigital hairpin resonators of the UWB filter. To validate the proposed concept, a prototype was fabricated and tested. The experimental results are presented and discussed. The obtained results show a good agreement between experimental and full‐wave electromagnetic (EM) simulation results. © 2011 Wiley Periodicals, Inc. Microwave Opt Technol Lett 53:1298–1302, 2011; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.25963

Integrated Bluetooth/Imt-E and Uwb Planar Antenna Using SCRLH Resonator to Reject Wlan and Wimax Interferences

“…15-5.825 GHz. To reject these interferences, various planar monopole UWB antennas with single or multiple band-notched characteristics have been presented [2][3][4][5][6][7][8][9]. Many of these antennas adopted several slots [2,[4][5][6][7] in the radiating patch and the ground plane, or parasitic strips [3] near the radiating patch to generate bandnotched characteristics.…”

“…The gain values were low at high frequencies [2,3], or the fidelity factor was only less than 0.9 [4]. Other antennas used filter structures around the feed systems [8,9]. In this case, the embedded filter structure increased the dimensions and the complexity of the final design.…”

Compact Reconfigurable Uwb Antenna Integrated With Stepped Impedance Stub Loaded Resonators and Switches

“…For these reasons, UWB communication has attracted much attention in recent years. A UWB antenna is an important part in UWB wireless communication, and a lot of UWB antennas have been proposed for UWB applications [2][3][4][5][6][7][8][9][10][11][12][13][14]. However, most of the previous UWB antennas have large size and complex structures.…”

“…Designing a UWB antenna with one or several rejection filter characteristics is a hot topic in recent years. Plenty of UWB antennas with notch band characteristics have been developed for these applications [9][10][11][12][13][14]. However, most of the notch band UWB antennas are formed by etching half wavelength or quarter wavelength slot on radiation patch and ground plane.…”

“…The embedded slots will leak electromagnetic wave which deteriorates the radiation patterns of notched UWB antennas. An effective technology is to insert open circuited stubs [11,12] into the UWB antenna and integrate filter [13][14][15] in the feed line and active region. Some antennas using SRRs in the feed structures [15] are also utilized to avoid the unrequired band.…”