Abstract
ESPAR antenna systems are composed of one active and several parasitic elements and by changing the characteristic of the parasitic elements on the antenna, the radiation pattern will also change. Such characteristic makes ESPAR antenna useful in many applications, e.g., single RF MIMO transmission. However, for higher modulation schemes like 16-QAM, more radiation patterns are needed which require a wider control range on the parasitic antenna load. In order to explore the capability of ESPAR antennas, negative resistance was proposed, but their values cannot be easily controlled both on the real and imaginary part. So a matching network is required to control the load value. This paper presents an idea of adjusting the parasitic ESPAR antenna loads with controllable passive elements. According to simulation, the control circuit consumes less than 1mW power on 64 patterns selection, which explores the capacity of ESPAR antenna for high order modulation applications.
| Original language | English |
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| Publication date | 25 Apr 2012 |
| Number of pages | 4 |
| Publication status | Published - 25 Apr 2012 |
| Event | The 28th Conference on Technologies and Visions for a Sustainable Wireless Internet - Athens, Greece Duration: 23 May 2011 → 25 May 2011 |
Conference
| Conference | The 28th Conference on Technologies and Visions for a Sustainable Wireless Internet |
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| Country/Territory | Greece |
| City | Athens |
| Period | 23/05/2011 → 25/05/2011 |