Study of a band‐notched double printed dipole antenna

2010

The proposed novel p-shaped microstrip antenna with a shorting pin is constructed and measured for the dual-band (5.2/ 5.8 GHz) WLAN band, and then RL is measured using an Agilent N5230A vector network analyzer. Its far-field patterns and gain are measured inside a possible compact range at Incheon University TIC, Korea.Both the simulated and measured RLs of the p-shaped dualband antenna with a shorting pin are shown in Figure 2. The measurement ranges are 5. 147-5.358 and 5.712-5.826 GHz, which reached $211 and 114 MHz, respectively, thus covering the 5.2/5.8 GHz band for WLAN systems (RL < À10 dB). Figure 3 presents the simulated RLs for the proposed pshaped dual-band antenna with and without a shorting pin. The simulated result with a shorting pin has a wider band than the simulated result without a shorting pin. The ranges are 5.120-5.362 and 5.718-5.885 GHz, which reached 242 and 167 MHz (RL < À10 dB), respectively. Figure 4 presents the measured RPs of the E-plane and the H-plane, respectively. The RPs are measured from 5.1 to 5.9 GHz. The green and black lines represent the RPs at 5.25 and 5.80 GHz, respectively. The 3-dB beamwidth (half-power bandwidth) in the E-plane and H-plane is 82.23 and 84.55 at 5.25 GHz. Thus, good RPs are obtained in the dual-band WLAN bandwidth. Figure 5 shows the simulated and measured antenna gain for the operating frequencies across the dual-band WLAN band (5.2/5.8 GHz) where the gain of 5.73-6.52 dBi is obtained. CONCLUSIONSIn this article, a novel p-shaped dual-band microstrip patch antenna with a shorting pin for dual-band WLAN (5.150-5.350 and 5.725-5.825 GHz) was designed, fabricated, and tested. The impedance bandwidths were 211 (5.147-5.358 GHz) and 114 MHz (5.712-5.826 GHz), covering the required WLAN bandwidth (5.2/5.8 GHz). The gain obtained from 5.73-6.52 dBi matched the wireless LAN specifications. The radiation characteristics of the proposed antenna were also observed. The results demonstrate that the proposed novel p-shaped dual-band microstrip patch antenna with a shorting pin can be applied to dualband WLAN systems (5.2/5.8 GHz).ABSTRACT: A printed circular-ring monopole antenna with bandnotched feature for ultra-wideband application has been presented and investigated. The band-notched characteristic is achieved by attaching a C-shaped short-circuited stub. Experimental results show that the proposed antenna meets the requirement of wide-working bandwidth of 3.1-10.6 GHz with voltage-standing wave ratio <2, while avoiding the interference with the 5 GHz wireless local area network band. Transfer functions of the antenna systems are given experimentally, and the parametric studies are performed numerically in this article.ABSTRACT: We proposed a compact microstrip band-pass filter with wide stopband in this article. Microstrip gap and interdigital capacitor combine with stub inductors shorted to the ground plane by via were used to take advantage of different aspects of left-handed behavior to achieve compact size and wide stopband characteristics. The design...

Section: Resultsmentioning

confidence: 99%

A printed circular‐ring monopole antenna with band‐notched feature for UWB application

2010

“…Therefore, they are not suitable for triple-band operations. Some triple-band 3 dB power dividers have been reported in [6,7], but they only operate with two output ports.…”

Section: Resultsmentioning

confidence: 99%

“…The transfer function and group delay of the transmittingreceiving system are also analyzed to evaluate the antenna performance from a system point of view [5][6][7][8][9]. Figure 1 shows the geometry of the proposed monopole antenna.…”

Section: Introductionmentioning

confidence: 99%

A ring monopole antenna for UWB application

2009

“…Transfer function and time domain behavior are other important issues to be considered in the design of UWB antennas. A good time domain performance is necessary for UWB signal transmission and reception [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Double‐printed rectangular patch dipole antenna with band‐notched function for UWB communications

2009

A novel double‐printed rectangular patch dipole antenna with a band‐notched function suitable for UWB application is presented and investigated in this article. The band‐notched characteristic is achieved by connecting L‐shaped strips to the antenna rather than inserting slot to the antenna. The measured results show that the frequency band of VSWR < 2 covers 3.1 to 10.6 GHz UWB band, whereas the notched‐frequency range is 5.05–6.1 GHz which covers 5GHz WLAN band of 5.15–5.825 GHz. Transfer function and time domain characteristics are also studied in this article. © 2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 269–272, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24921