Abstract
In this paper, an internal multiband antenna is proposed for LTE-A/WWAN wireless applications in tablet computer. The proposed antenna is configured to have two branch radiators. These two branch radiators are a U-shaped driven monopole and a nonuniform wrapped inverted U-shaped monopole. The impedance bandwidths across dual operating bands are 89.7 MHz and 4185 MHz at the LTE-A/WWAN bands. Various techniques, such as branching and parasitic element are used to enhance the antenna’s bandwidth, the matching, and the size of the proposed antenna. The antenna is presented on an area of 50 × 15 mm2. Experimental results of this antenna show nearly omni-directional coverage and stable gain variation across the LTE-A/WWAN bands.
Highlights
One of the main advantages of Long Term Evolution Advanced (LTE-A) which makes it a good candidate for 4G wireless communication is the large bandwidth
LTE-A provides much higher data rate for real-time voice and data transmission than WWAN operation. This is the motivation for different researchers to introduce different LTE antenna configurations which are suitable to be integrated with mobile wireless systems like tablet and laptop computers
The three-dimensional structure of Planar Inverted-F Antennas (PIFAs) requires an additional height clearance leading to a more complex manufacturing process and higher cost. Another form which is commonly used for LTE/WWAN antenna is based on embedding a chip inductor on the radiating path of an antenna [4] [8] [9] to reduce the antenna size and match in the input impedance of the antenna at the required operating frequency band
Summary
One of the main advantages of Long Term Evolution Advanced (LTE-A) which makes it a good candidate for 4G wireless communication is the large bandwidth. LTE-A provides much higher data rate for real-time voice and data transmission than WWAN operation This is the motivation for different researchers to introduce different LTE antenna configurations which are suitable to be integrated with mobile wireless systems like tablet and laptop computers. The three-dimensional structure of PIFA requires an additional height clearance leading to a more complex manufacturing process and higher cost Another form which is commonly used for LTE/WWAN antenna is based on embedding a chip inductor on the radiating path of an antenna [4] [8] [9] to reduce the antenna size and match in the input impedance of the antenna at the required operating frequency band. Combination of planar monopole antenna branches can introduce a wider operating bandwidth [5] [13]-[15] This configuration is more suitable for PCB fabrication process [16] [17].
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