z-logo
Premium
Fan‐shaped antennas: Realization of wideband characteristics and generation of stop bands
Author(s) -
Nakano H.,
Morishita K.,
Iitsuka Y.,
Mimaki H.,
Yoshida T.,
Yamauchi J.
Publication year - 2008
Publication title -
radio science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.371
H-Index - 84
eISSN - 1944-799X
pISSN - 0048-6604
DOI - 10.1029/2007rs003784
Subject(s) - stopband , standing wave ratio , physics , wideband , ground plane , fan out , acoustics , center frequency , mechanical fan , optics , wavelength , electrical engineering , antenna (radio) , engineering , band pass filter , microstrip antenna , optoelectronics , wafer , thermodynamics
This paper presents four fan‐shaped antennas: U.S.‐FAN, CROSS‐FAN, CROSS‐FAN‐W, and CROSS‐FAN‐S. Each of these antennas stands upright above a ground plane, and has edges expressed by an exponential function and a circle function. The four antennas are investigated using frequencies from 1.5 GHz to 11 GHz. The CROSS‐FAN is found to have a lower VSWR over a wide frequency band compared to the U.S.‐FAN. The CROSS‐FAN‐W and CROSS‐FAN‐S are modified versions of the CROSS‐FAN, each designed to have a stop band (a high VSWR frequency range) for interference cancellation. The stop band for the CROSS‐FAN‐W is controlled by a wire (total length 4L wire ) that connects the fan‐shaped elements. The center frequency of the stop band f stop is close to the frequency corresponding to a wire segment length L wire of half the wavelength. It is also found that the stop band in the CROSS‐FAN‐S can be controlled by four slots, one cut into each of the fan‐shaped elements. The center frequency of the stop band f stop is close to the frequency corresponding to a slot length L slot of one‐quarter of the wavelength. Experimental work is performed to confirm the theoretical results, using the CROSS‐FAN‐S.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here