Tunable Monopole Circular Microstrip Antenna for Dual frequency Covering L, C and X band Applications
DOI:
https://doi.org/10.26438/ijcse/v7i6.507511Keywords:
Identical stubs, slot, CMCMSA and TMCMSADFAbstract
In this paper, we have presented simulated and measured results of tunable monopole circular microstrip antenna for dual frequency which covers L, C, and X band applications. The proposed antenna consists of two identical stubs placed along the patch axis having fixed width WS =1.0 cm. The slot is placed on left side of feed axis which is having fixed L1= 1.279 cm, L2 =1.3 cm and width W1= 0.1 cm. The upper and lower length of two identical stub is varied from LUS=0.483 to 1.83 cm and LLS=0.257 to 0.957 cm to tune an antenna for dual band. The first band varies from 1.8325 GHz to 1.5175 GHz having tuning range of 17.48% and 16.0% and second band varies from 8.5375 GHz to 7.2775 GHz having tuning range of 14.77% and 12.48% when simulated and measured respectively. The maximum impedance bandwidth of 111 % and 30.9 % is achieved for first and second band respectively. The antenna has peak gain of 3.0 dB. The VSWR is less 2 than for all tuned frequencies. The proposed antenna covers applications of L, C and X band. The simulated results are in good agreement with experimental results. The radiation patterns are nearly omni-directional nature both in E and H plane.
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