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Dual-feed small-size LTE/WWAN strip monopole antenna for tablet computer applications

Author:
Po-Wei Lin and Kin-Lu Wong  


Journal:
Microwave and Optical Technology Letters


Issue Date:
2013


Abstract(summary):

A small-size strip monopole antenna with dual feeds disposed at one corner of the supporting metal plate of the display of the tablet computer for LTE/WWAN operation is presented. The strip monopole is configured into a simple inverted-L shape of 29 mm (less than 0.08 wavelength at 750 MHz) and has a low profile of 10 mm above the two side edges of the corner. A first end of the strip monopole can be connected to a first ON/OFF switch (switch-1) for lower-band operation, while a second end of the strip monopole can be connected to a second ON/OFF switch (switch-2) for higher-band operation. When switch-1 is ON with switch-2 OFF, the antenna is fed at port-1. In this case, with the aid of a wideband matching circuit, the antenna can provide a wide lower band to cover the LTE band13 and GSM850/900 operation (746–960 MHz). When switch-1 is OFF with switch-2 ON, the antenna is fed at port-2 and can provide a wide higher band to cover the GSM1800/1900/UMTS/LTE2300/2500 operation (1710–2690 MHz). Good radiation characteristics for frequencies over the antenna's operating bands are also obtained. Operating principle of the antenna is described in the article. Experimental results and parametric studies of the antenna are presented.


Page:
2571-2576


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