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In this paper, two multiband MIMO antennas for mobile handsets are proposed. The first antenna is capable of covering GSM900, GSM1800, GSM1900, and UMTS. It has two loop type antenna elements, which are with the same structures and dimensions. The dimensions of the antenna element is 22.5∗25mm2. Two structures which are slot and inverted-L branches on the ground, are used to minimize the mature coupling...
In this paper, a novel experimental solution for the characterization of the binary input impedance of Ultra High Frequency (UHF) band Radio Frequency Identification (RFID) transponder chip is presented. The proposed method is easy to setup using common test instruments. The tag chip is directly soldered to a 50-Ω subminiature A (SMA) connector, and then connected to a vector network analyzer (VNA)...
A broadband circular polarized two-element planar inverted-F antenna (PIFA) with pattern diversity and high isolation for multimode satellite navigation is reported. Circular polarization characteristic of the proposed antenna is achieved by introducing a cross branch at its corner of the ground. The modified PIFA structure gives the antenna a broadband impedance bandwidth characteristic. A prototype...
A broadband planar antenna with circular polarization is proposed, fabricated and measured. Circular polarization (CP) radiation of the proposed antenna is achieved by introducing a cross branch at its corner. And the modified PIFA structure gives the antenna a broadband impedance bandwidth characteristic. For ease in integration with active devices and design facilitation, the radiating element and...
In this paper, a novel compact antenna for portable GPS terminals is presented. The size reduction of the novel compact antenna is achieved by using interdigital metal coupling and dielectric load. The dimensions of the presented antenna are 8.8*3.1*2.5 mm3. Both the simulation and measurement results show that the antenna resonates at 1.575 GHz with impedance bandwidth of 100 MHz and offers a maximum...
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