A wideband coplanar waveguide (CPW)-fed two-arm spiral slot antenna without a balun circuit is presented in this article. Phase progressions at arm ports are realized through the coplanar waveguide excitations. A detailed characterization of all antenna components and parameters is provided along with guidelines and recommendations for broad bandwidth and small reflection. Variations of the impedance matching due to the turn numbers, the ground width separated between two neighboring turns and the slot width are tested and studied. The measured impedance bandwidth of a S11 ≤ 10 dB ranges from 1.63 to 8 GHz and covers most of the commercial wireless communication systems, such as DCS, PCS, IMT-2000, WLAN, Bluetooth, and HIPERLAN. © 2008 Wiley Periodicals, Inc. Microwave Opt Technol Lett 51: 222–225, 2009; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.23947
[2]
A. M. Ferendeci,et al.
Broadband slotted spiral antennas with thin dielectric substrates
,
2002,
Proceedings RAWCON 2002. 2002 IEEE Radio and Wireless Conference (Cat. No.02EX573).
[3]
W. Wiesbeck,et al.
Spiral Antenna with Planar External Feeding
,
1999,
1999 29th European Microwave Conference.
[4]
W. Wiesbeck,et al.
Spiral antenna with external feeding for planar applications
,
1999,
1999 IEEE Africon. 5th Africon Conference in Africa (Cat. No.99CH36342).
[5]
Meng Zhang,et al.
Low profile spiral antenna with PBG substrate
,
2000
.
[6]
W. Curtis,et al.
Spiral antennas
,
1960
.