Polarization-Reconfigurable Leaky-Wave Antenna with Continuous Beam Scanning through Broadside

Shu Lin Chen, Debabrata K. Karmokar, Pei Yuan Qin, Richard W. Ziolkowski, Y. Jay Guo

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


A simple single-layer reconfigurable leaky-wave antenna (LWA) is presented that has polarization agility and beam-scanning functionality. This LWA system realizes a scanned beam that can be switched between all of its linear polarization (LP) and circular polarization (CP) states using only one dc biasing source. A slot-loaded substrate-integrated waveguide (SIW)-based LWA is first explored to attain CP performance with continuous beam scanning through broadside. This CP LWA realizes a measured CP performance with a 3 dB gain variance within 2.75-3.35 GHz for scan angles ranging from -28.6° to +31.5°. A row of shorted stubs is then incorporated into the CP LWA to obtain similar LP performance. Finally, by introducing p-i-n diodes into this LP LWA configuration to facilitate reconfigurable connections between the main patch and the shorted stubs, the radiated fields can be switched between all of its CP and LP states. The measured results of all three antennas confirm their simulated performance. It is demonstrated that the main beam of the polarization-reconfigurable LWA can be scanned from -31.5° to +17.1° with gain variations between 9.5 and 12.8 dBic in its CP state and from -34.3° to +20° with them between 7.8 and 11.7 dBi in its LP state.

Original languageEnglish (US)
Article number8805237
Pages (from-to)121-133
Number of pages13
JournalIEEE Transactions on Antennas and Propagation
Issue number1
StatePublished - Jan 2020
Externally publishedYes


  • Beam scanning
  • circular polarization (CP)
  • leaky-wave antenna (LWA)
  • linear polarization (LP)
  • polarization-reconfigurable
  • traveling wave

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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