scholarly journals RECONFIGURABLE BAND-NOTCHED SLOT ANTENNA USING SHORT CIRCUITED QUARTER WAVELENGTH MICROSTRIP RESONATORS

2016 ◽  
Vol 68 ◽  
pp. 119-127 ◽  
Author(s):  
Hany A. Atallah ◽  
Adel B. Abdel-Rahman ◽  
Kuniaki Yoshitomi ◽  
Ramesh K. Pokharel
Keyword(s):  
Slot Antenna ◽  
Quarter Wavelength ◽  
Microstrip Resonators

scholarly journals Comb-Line Filter with Coupling Capacitor in Ground Plane

2011 ◽  
Vol 2011 ◽  
pp. 1-6
Author(s):  
Toshiaki Kitamura
Keyword(s):  
Numerical Simulations ◽  
Strong Coupling ◽  
Ground Plane ◽  
Coupling Coefficients ◽  
Quarter Wavelength ◽  
Coupling Capacitor ◽  
Microstrip Resonators

A comb-line filter with a coupling capacitor in the ground plane is proposed. The filter consists of two quarter-wavelength microstrip resonators. A coupling capacitor is inserted into the ground plane in order to build strong coupling locally along the resonators. The filtering characteristics are investigated through numerical simulations as well as experiments. Filtering characteristics that have attenuation poles at both sides of the passband are obtained. The input susceptances of even and odd modes and coupling coefficients are discussed. The filters using stepped impedance resonators (SIRs) are also discussed, and the effects of the coupling capacitor for an SIR structure are shown.

scholarly journals A Miniaturize Bandpass Filter with Harmonic Suppression Using Meandered Quarter-Wavelength Resonators

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Yun-Long Lu ◽  
Shun Wang ◽  
Tingting Gu ◽  
Ping Cao ◽  
Kai Li
Keyword(s):  
Coupling Coefficient ◽  
Bandpass Filter ◽  
Size Reduction ◽  
Harmonic Suppression ◽  
Third Harmonic ◽  
Interdigital Capacitor ◽  
The Third ◽  
Quarter Wavelength ◽  
Microstrip Resonators ◽  
Zero Voltage

A miniaturized bandpass filter with harmonics suppression is presented. The proposed filter consists of two quarter-wavelength microstrip resonators, which are meandered for circuit size reduction. An interdigital capacitor, loading at zero-voltage point, is employed to provide the desired coupling between the resonators at operating frequency, whereas the coupling coefficient at the third harmonic is realized to be zero. Besides, the second and fourth harmonics are suppressed sinceλ/4 resonators are adopted. Benefiting from these properties, a miniaturized bandpass filter with the second, third, and fourth harmonics suppression was designed and implemented. The final measured and simulated results show good consistence with the theoretical counterparts.

Design and Analysis of Air Gap Microstrip Slot Antenna Using Aperture Coupling

2012 ◽  
Vol 2 (4) ◽  
pp. 104-106
Author(s):  
J. P. Ganji J. P. Ganji ◽  
◽  
M.C.Sahoo M.C.Sahoo ◽  
J.M.Rathod J.M.Rathod
Keyword(s):  
Air Gap ◽  
Slot Antenna ◽  
Aperture Coupling
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