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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Pynttari, V. Halonen, E. Sillanpaa, H. Mantysalo, M. Makinen, R. |
| Copyright Year | 2002 |
| Abstract | The suitability of local conductive print-layer thickness variation for RF applications is demonstrated on flexible substrates. First, the concept is subjected to printed transmission lines as attenuation of one- and two-layer lines is compared to lines having additional layers only on critical high-current areas. Then, two antenna types are studied by applying local additions to the feed line and radiator with optimized print parameters for each layer utilizing low-temperature ink enabling a variety of substrate materials. For a narrow wire-type antenna, efficiency improvement with local thickness increase is observed both at 868 MHz and 2.4 GHz, reaching the efficiency level of a full two-layer antenna. For a wide monopole-type antenna at 2.4 GHz, the similar efficiency improvement up to the full two-layer level is seen already by increasing the edge thickness on the feed line. Accordingly, the antenna type is promising for printing with satisfactory efficiency only with one-layer print on the antenna element. The printed antennas also show good electrical performance, with only approximately 5%-10% decrease in efficiency compared to thick 18-μm copper reference antennas. |
| Sponsorship | IEEE Antennas and Propagation Society |
| Starting Page | 188 |
| Ending Page | 191 |
| Page Count | 4 |
| File Size | 402300 |
| File Format | |
| ISSN | 15361225 |
| Volume Number | 11 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2012-01-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Antenna measurements Coplanar waveguides Printing Feeds Ink Transmission line measurements UHF antennas flexible printed circuits transmission lines |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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