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Circular microstrip antennas

Circular microstrip antennas

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The circular microstrip antenna offers a number of radiation pattern options not readily implemented using a rectangular patch. After a brief discussion of the properties of circular microstrip antennas, the Chapter looks at: directivity, input resistance and impedance bandwidth, gain and efficiency. It goes on to consider various radiation modes, cross-polarisation, and annular-/shorted-annular microstrip antennas.

Chapter Contents:

  • 3.1 Circular microstrip antenna properties
  • 3.2 Directivity
  • 3.3 Input resistance and impedance bandwidth
  • 3.3.1 TM11, TM21, and TM022 impedance bandwidth
  • 3.4 Gain, radiation pattern, and efficiency
  • 3.4.1 TM11 efficiency
  • 3.4.2 TM21 efficiency
  • 3.4.3 TM02 efficiency
  • 3.5 Circular microstrip antenna radiation modes
  • 3.5.1 The TM11 bipolar mode
  • 3.5.2 TM11 bipolar mode circular polarized design
  • 3.5.3 The TM21 quadrapolar mode
  • 3.5.4 The TM02 unipolar mode
  • 3.6 Circular microstrip antenna cross-polarization
  • 3.7 Annular microstrip antenna
  • 3.8 Shorted annular microstrip antenna
  • References

Inspec keywords: monopole antennas; antenna radiation patterns; microstrip antennas; electromagnetic wave polarisation; loop antennas

Other keywords: circular microstrip patch antenna; radiation modes; gain; monopole-type pattern; radiation pattern; input resistance; linear polarization; impedance bandwidth; annular microstrip antennas; efficiency; cross-polarisation; circularly polarized radiation; shorted-annular microstrip antennas; directivity

Subjects: Single antennas

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