Antenna ESPA

[Admin 2545]

A compact dual-polarized double E-shaped patch antenna(ESPA) with high isolation for pico base station applications is presented in this communication. The proposed antenna employs a stacked configuration composed of two layers of substrate. Two modified E-shaped patches are printed orthogonally on both sides of the upper substrate. Two probes are used to excite the E -shaped patches, and each probe is connected to one patch separately. A circular patch is printed on the lower substrate to broaden the impedance bandwidth. Both simulated and measured results show that the proposed antenna has a port isolation higher than 30 dB over the frequency band of 2.5 GHz – 2.7 GHz, while the return loss is less than -15dB within the band. Moreover, stable radiation pattern with a peak gain of 6.8 dBi – 7.4 dBi is obtained within the band.

,,,MADE BY Yanshan Gou, Shiwen Yang, Quanjiang Zhu, and Zaiping Nie

[Admin 2545]

In the proposed antenna, however, the slot lengths ( E1-E4 ) play important roles in controlling not only the bandwidth but also the port isolation.

It can be seen that when the slot length decreases, the lower resonant frequency increases and leads to bandwidth deterioration, due to the fact that the inductance of the slot is reduced as the slot length decreases.

,,,and this it"s the simulation...