A design of dual-band balanced antenna structure operating in the 700 and 2600 MHz LTE bands is studied and investigated. The overall dimensions of the radiator are 50 × 18 × 7 mm allowing it to be easily concealed within mobile handsets. A broad-band balun is designed and integrated with the antenna handset in order to provide the feeding network and perform the measurements of the antenna rad...

Channel capacities and data rates of mobile communications have been increasing to meet demands of modern communications. In order to achieve a low bit error rate (BER), we need high signal to interference plus noise ratio (SINR). To realize the high SINR, it is effective to use an adaptive array antenna [1]. The adaptive array antenna can reduce the influence of multipath rays. On the other ha...

A high performance monopole antenna fabricated using a folded wire line and metal patch as radiator is presented. A prototype of the proposed monopole antenna with a compact area size is implemented, and the multi-band WLAN antenna shows a wide operating bandwidth of about 530MHz and 3400MHz for low band and high band, bandwidth, making it easy to cover the IEEE 802.11a, IEEE 802.11b, IEEE 802....

Abstracr We construct simal constellations for differential transmission with multiple basestation antennas. The signals are derived using the theory of fixed-point-free groups and are especially suitable for mobile cellular applications because they do not require the handset to have more than one antenna or to know the time-varying propagation environment. Yet we achieve full transmitter dive...

This paper presents a procedure for the evaluation of the Electromagnetic (EM) interaction between the mobile phone antenna and human body, i.e., head and hand, and investigates the factors may influence this interaction. These factors are considered for different mobile phone handset models, different form factors and different antenna types, operating in the GSM900, GSM1800/DCS, and UMTS/IMT2...

A low profile planar antenna for twelve-band operation in the mobile phone is presented. The proposed antenna radiating elements occupy an area equals 17 × 50 mm are mounted on the compact no-ground portion of the system circuit board to achieve a simple low profile structure. In order to overcome the shortcoming of narrow bandwidth for conventional planar printed antenna, a novel bandwidth enh...

Silicon-on-insulator technology offers solutions to the higher-performance and lower-power dilemma Digital Systems: New two-antenna handset technology improves CDMA network performance Tx/Rx: Making phase shifters affordable for widespread commercial electronically scanned antenna arrays Mixed Signal: High-speed digital and mixed-signal ICs using advanced indium phosphide heterojunction bipolar...