Design of the Novel Band Notched UWB Antenna with the Spiral Loop Resonators

Abstract

In this paper, a novel configuration of circular ultra-wideband (UWB) antenna with band rejection characteristic is presented. In order to obtain this characteristic, the spiral loop resonators resonating at the rejection frequency are located in both sides of the circular radiating patch. This novel structure provides the band-notched characteristic without the degradation of the UWB antenna performance itself. Furthermore, the notched band can be easily tuned by adjustment of resonator dimension because the size of the spiral loop resonators controls the corresponding resonance frequency. This prototype antenna has been fabricated on a substrate, Rogers 4003, with the thickness of 0.8 mm and relative permittivity of 3.38. The fabricated UWB antenna covers the frequency band from 3.1 to 11.23 GHz (S 11 ≤ −10 dB), and the band rejection characteristic appears near at 5.8 GHz band to which the wireless LAN service is assigned. And the far-field radiation patterns of the proposed antenna show omnidirectional and stable over the whole frequency band, which prospects the deployment in the UWB system. The measured results agree well with the simulation by the Microwave Studio of CST. This novel technique utilizing the spiral loop resonators might be useful to the planar antennas requiring the band rejection characteristics.

Design and Analysis of Tapered Slot Antenna With 3.5/5.5 GHZ Band-Notched Characteristics

“…Many designs have been presented in the literature concerning the UWB antenna with band-notched characteristics. Those designs use various types of addition (i.e., slots, slits, and parasitic elements) in the radiator, the ground plane, or even in the feeder to achieve the required band-notched characteristics with limited impact on the required passband [7][8][9][10][11][12][13][14][15][16].…”

Triple Notched Band Characteristics UWB Antenna Using C-Shaped Slots and Slot-Type Capacitively-Loaded Loop (CLL)

“…Therefore the UWB antennas with a band-notched characteristic are required. To satisfy such requirement various ultrawideband antennas with notched band have been studied [5][6][7][8][9][10][11][12][13][14][15][16][17]. To introduce such a band-notched function, several methods have been proposed, including embedding a slot of different shapes in the radiating patch, or in the ground plane, using parasitic patches, embedding a slit in the feeding strip, or etching split ring resonator (SRR) coupled to the feed-line [9], or the CSRR (the negative image of SRR) structure [18].…”

Benefits of wide-area intrusion detection systems using FMCW radar

“…However, one limiting factor of these antennas is their low bandwidth. Therefore, several configurations were carried out to increase the bandwidth of planar antennas such as ultra-wideband antennas rectangle shape [1][2][3][4], circular [5][6][7][8], elliptical [9], triangle [10] and several other types of antennas [11][12][13][14][15][16][17].…”