Design of Compact Multiband Annular-Ring Slot Antenna

  • C. R. PrashanthEmail author
  • Mahesh N. Naik
Part of the Studies in Computational Intelligence book series (SCI, volume 771)


An annular-ring microstrip antenna (ARMSA) with a defective ground structure for multiband operation is proposed. The proposed antenna operates at three different frequency bands, at S/C/X bands. Initially, the antenna is operated in dual-band mode from 1 to 12 GHz; then, by introducing an annular ring slot, a multiband mode antenna is realized. A microstrip feed line is used to excite the annular-ring patch antenna embedded on FR-4 substrate with a dielectric constant εr = 4.4. The designed antenna is circularly polarized with waveport excitation; it is best suited for multiband applications.


Annular ring Microstrip antenna Defective ground structure Multiband ARMSA Microstrip feed 


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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of Telecommunication EngineeringDr. Ambedkar Institute of TechnologyBengaluruIndia

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