A02-100: High Gain Antenna for Wireless Local Area Network (LAN), "Multi-Band Coaxial CTS Antenna"
Abstract
Report developed under Phase I SBIR contract for topic A02-100. US Military mobility and network centric warfare drove need for directive, steerable antennas at 1.85.7 GHz. ThinKom (and University of Hawaii) investigated antenna technologies: 1) multi-band coaxial CTS and 2) WAVETRAP, invented by ThinKom. Coaxial CTS and WAVETRAP naturally broad beam, but can generate high gain beams; 20+dB for coaxial CTS and 10+dB for WAVETRAP. For beam steering & sidelobe control, coaxial OTS arrays require phase/amplitude components between radiating elements. WAVETRAP uses simple switching mechanisms to steer and fixed weighting to control sidelobes Phase I SBIR objective was to span 1.85.7 GHz in low profile antenna. Coaxial CTS demonstrated, via UH FDTD analysis, combining of 1.8 & 2.4GHZ, and 4.4 & 5.7GHz, but not all four in one array. Four-band coaxial CTS array above PBG ground planes would be 40-50"L X 4'W X 2'H. WAVETRAP spans <1 .8->5.7GHz in one low profile antenna < 1'H X 10"D (>gain with> diameter). Coaxial CTS and WAVETRAP offer some of the desired capabilities, however, WAVETRAP's operational implicity, wide bandwidth and low profile make it ThinKom's choice for development of mobile WLAN commercial products, and therefore the recommendation for military mobile WLAN applications.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 18, 2004
- Accession Number
- ADA425782
Entities
People
- Magdy Iskander
- Michael A. Burke
- William W. Milroy