Qisda (Taiwan)

With the shunted passive components, a simple structure, multiband slot antenna is proposed. Shunted passive components act as different boundary condition at different frequency. Properly choosing the value of passive components and the location of the shunted passive components, the proposed antenna can generate three resonate mode to cover LTE700, GSM850, GSM900, GSM1800, GSM1900, UMTS, LTE2300, and LTE2500 operating bands for 4G system applications. Results of measurement for return loss, current distribution, radiation pattern and antenna Gain of proposed antenna are presented and discussed.

A penta-band internal monopole antenna with a novel parasitic strip suitable for GSM850/GSM900/DCS/PCS/UMTS2100 applications is constructed and studied. The proposed antenna is located at the bottom of the edge of the ground plane in main printed circuit board (PCB). It has antenna matching network and one parasitic strip using the new conception of the parasitic mode and second mode. It is an internal penta-band antenna suitable for most Asia, American and European 2 G/3 G handheld devices. The simulated impedance bandwidth covers the required bandwidth of the GSM 850(824-894), GSM900 (880-960 MHz), DCS (1710-1880 MHz), PCS (1850-1990 MHz) and UMTS 2100 (1920-2170) bands.