Design and Development of a Compact UWB Monopole Antenna with Easily-Controllable Return Loss

Symeon Nikolaou, Muhammad Ali Babar Abbasi

Research output: Contribution to journalArticlepeer-review

56 Citations (Scopus)
801 Downloads (Pure)


This communication presents a novel cactus-shaped ultrawideband (UWB) monopole antenna fabricated on liquid crystal polymer (LCP). The proposed antenna is a very compact design, since it can be fabricated on a board with dimensions only 20 × 28 mm2, while the three linear segments that comprise the cactus-shaped monopole provide a direct control on antenna matching. The proposed antenna is operating from 2.85 to 11.85 GHz and it presents very consistent omnidirectional patterns throughout the UWB frequency range. Return loss and pattern measurements are presented and the operation principles are discussed in detail. The simplicity of this topology, with the easily controllable return loss, allows for its easy implementation for various UWB subband designs, just by building suitable monopole versions, for which the only difference is the length of the three linear segments.

Original languageEnglish
Pages (from-to)2063-2067
Number of pages5
JournalIEEE Transactions on Antennas and Propagation
Issue number4
Early online date16 Feb 2017
Publication statusPublished - Apr 2017
Externally publishedYes


  • Cactus antenna
  • compact antenna
  • liquid crystal polymer (LCP)
  • U-shaped stub
  • ultrawideband (UWB)
  • UWB monopole

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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