Abstract
The possibility of building compact, low-ohmic antennas suitable for mobile handsets is investigated. An F-antenna is built with a self-impedance of 10 Ω instead of the commonly used 50 Ω. Low impedance is chosen to minimize voltages in circuits prior to the antenna, in this case an adaptive matching network designed in CMOS or a similar process. To optimize this adaptive matching network, the antenna structure is two-fold: one antenna for transmission and one for reception. A resulting benefit is increased isolation between transmitter and receiver, as shown for a typical case. The 10 Ω antenna has an average efficiency of over 70% and an omnidirectional pattern; isolation increases by distance and reaches about 10dB at 4 cm
| Original language | English |
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| Title of host publication | 2004 IEEE 60th Vehicular Technology Conference. VTC2004-Fall (IEEE Cat. No.04CH37575) |
| Publisher | IEEE - Institute of Electrical and Electronics Engineers Inc. |
| Pages | 220-224 |
| ISBN (Print) | 0-7803-8521-7 |
| Publication status | Published - 2004 |
| Event | IEEE Vehicular Technology Conference, VTC Fall, 2004 : Wireless Technologies for Global Security - Los Angeles, Los Angeles, CA, United States Duration: 2004 Sept 26 → 2004 Sept 29 Conference number: 60 |
Conference
| Conference | IEEE Vehicular Technology Conference, VTC Fall, 2004 |
|---|---|
| Country/Territory | United States |
| City | Los Angeles, CA |
| Period | 2004/09/26 → 2004/09/29 |
Subject classification (UKÄ)
- Electrical Engineering, Electronic Engineering, Information Engineering
Free keywords
- circuit optimization
- CMOS
- adaptive matching network
- self-impedance
- F-antenna
- mobile handsets
- compact low-ohmic antennas
- low-impedance transmitter antenna
- multi-antenna WCDMA handsets
- transmitting antenna
- receiving antenna
- isolation
- omnidirectional pattern