Circular-polarized substrate-integrated-waveguide leaky-wave antenna with wide-angle and consistent-gain continuous beam scanning

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

Research output: Contribution to journalArticlepeer-review

54 Scopus citations


Circularly polarized (CP) antennas are in high demand for use in future wireless communications. To advance the development of CP substrate-integrated-waveguide (SIW) leaky-wave antennas (LWAs) with the intent to meet this demand, a novel benzene-ring-shaped slot-loaded LWA with partially reflecting wall (PRW) vias is investigated and verified to realize wide-angle continuous beam scanning with consistent gain. The dispersion features of slot-loaded SIW LWAs with PRW vias are theoretically explored using an equivalent circuit model. The CP radiation feature is investigated numerically utilizing the E- A nd H-field distributions of an initial design and its equivalent magnetic currents. The results of these studies are used to demonstrate that improved CP performance over a wide-angle scan range can be attained with a change from a standard slot shape to a benzene-ring-shaped slot. The resulting benzene-ring-shaped slot-loaded CP SIW LWA was optimized, fabricated, and measured. The measured results verify that a CP beam was continuously scanned through a wide angle from backward to forward directions with a consistent gain. The prototype exhibits a continuous 97.1° CP beam scan with a gain variation between 8 and 11.3 dBic when the source frequency is swept from 9.35 to 11.75 GHz.

Original languageEnglish (US)
Article number8691765
Pages (from-to)4418-4428
Number of pages11
JournalIEEE Transactions on Antennas and Propagation
Issue number7
StatePublished - Jul 2019
Externally publishedYes


  • Circularly polarized (CP)
  • consistent gain
  • continuous beam scanning
  • leaky-wave antenna (LWA)
  • substrate-integrated waveguide (SIW)

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


Dive into the research topics of 'Circular-polarized substrate-integrated-waveguide leaky-wave antenna with wide-angle and consistent-gain continuous beam scanning'. Together they form a unique fingerprint.

Cite this