A reconfigurable dual-frequency slot-loaded microstrip antenna controlled by pin diodes

2005 ◽  
Vol 44 (4) ◽  
pp. 374-376 ◽  
Author(s):  
Shynu S. V. ◽  
Gijo Augustin ◽  
C. K. Aanandan ◽  
P. Mohanan ◽  
K. Vasudevan
Keyword(s):  
Microstrip Antenna ◽  
Dual Frequency ◽  
Pin Diodes

Reconfigurable circularly polarized capacitive coupled microstrip antenna

2016 ◽  
Vol 9 (4) ◽  
pp. 843-850 ◽  
Author(s):  
Dinesh Kumar Singh ◽  
Binod Kumar Kanaujia ◽  
Santanu Dwari ◽  
Ganga Prasad Pandey ◽  
Sandeep Kumar
Keyword(s):  
Circular Polarization ◽  
Microstrip Antenna ◽  
Axial Ratio ◽  
Dual Band ◽  
Single Frequency ◽  
Impedance Bandwidth ◽  
Pin Diode ◽  
Dual Frequency ◽  
Pin Diodes ◽  
Circularly Polarized

The design and measurement of reconfigurable circularly polarized capacitive fed microstrip antenna are presented. Small isosceles right angle triangular sections are removed from diagonally opposite corners for the generation of circular polarization (CP) of axial ratio bandwidth of 11.1%. Horizontal slits of different lengths are inserted at the edges of the truncated patch to provide the dual-band CP and by switching PIN diodes across the slits ON and OFF, reconfigurable circularly polarized antenna is realized. The antenna shows dual-band behavior with reconfigurable CP. In order to enhance the operation bandwidth of the antenna, an inclined slot was embedded on the patch along with PIN diodes across the horizontal slits. This proposed antenna gave an impedance bandwidth of 66.61% (ON state) ranging from 4.42 to 8.80 GHz and 68.42% (OFF state) ranging from 4.12 to 8.91 GHz and exhibits dual-frequency CP with PIN diode in OFF state and single-frequency CP with PIN diode in ON state with good axial ratio bandwidth. The axial ratio bandwidth of 4.42, 2.35, and 2.72% is obtained from the antenna. The antenna has a similar radiation pattern in all the three different CP bands and almost constant gain within the bands of CP operation.

Compact dual-frequency semi-circular microstrip antenna

2004 ◽  
Vol 43 (5) ◽  
pp. 430-432 ◽  
Author(s):  
Wenjun Chen ◽  
Binhong Li ◽  
Xie Tao
Keyword(s):  
Microstrip Antenna ◽  
Dual Frequency ◽  
Circular Microstrip Antenna

Compact dual-frequency shorted rhombic microstrip antenna with a pair of slits

2002 ◽  
Vol 34 (3) ◽  
pp. 183-186 ◽  
Author(s):  
Yi-Fang Lin ◽  
Chin-Chun Kuo ◽  
Hua-Ming Chen
Keyword(s):  
Microstrip Antenna ◽  
Dual Frequency
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