CPW-Fed Sleeve Monopole Antenna With Complementary Sir Radiators for DTV Signal Reception and Circularly Polarized Applications

Abstract

A new circularly-polarized (CP) sleeve antenna fed by a CPW for DTV signal reception applications is presented in this paper. The CPW-fed sleeve monopole antenna consists of square loop sleeve, CPW-fed and complementary SIR radiators. The lower and upper resonance frequencies of the desired band are controlled by the complementary SIR arms, making designs of the wide-band antenna very easy. To demonstrate the idea, the proposed antenna was designed at the band with 470-863 GHz (BW = 393 MHz, 58.9%) for DTV UHF-bands. The antenna gains are varied about 2.2 to 4.0 dBi. An omnidirectional radiation property is also shown. The CP operation for the proposed design can be achieved by properly adjusting the asymmetrical radiators. The reflection coefficient, axial ratio, radiation pattern and gain of the proposed antenna were studied, and reasonable agreement between the simulated and measured results was obtained.

A Sleeve Monopole Antenna With Wide Impedance Bandwidth for Indoor Base Station Applications

“…But the antennas are too large to meet the indoor base station applications. In [11][12][13][14][15][16], several printed sleeve monopole antennas are investigated. However, the proposed antennas have narrow bandwidth and large size.…”

A Novel Loop-Like Monopole Antenna With Dual-Band Circular Polarization

“…Another design of exciting CP was to utilize a ground plane embedded with an inverted-L slit [13], which was capable of exciting two orthogonal electric fields with equal amplitude and phase difference of 90 • . Besides, the complementary SIR radiator can be controlled to obtain the dual-band CP characteristics [14]. But the mentioned antennas have disadvantages of narrow impedance bandwidth [13] and bulky volume [14].…”

“…Besides, the complementary SIR radiator can be controlled to obtain the dual-band CP characteristics [14]. But the mentioned antennas have disadvantages of narrow impedance bandwidth [13] and bulky volume [14].…”

“…Therefore, dual-band dualsense circularly polarized antennas have become a hot study in this research area during the last few years. Recently, monopole antennas in [12][13][14] were designed for dual-sense CP application. Although the design with a spiral structure [12] has the advantage of dual-sense CP operation, the 10-dB impedance bandwidth and the 3-dB axialratio (AR) bandwidth for the low and upper bands are relatively narrow.…”