Research On The Differential Integration Technology Of Microstrip Antenna

The development of differential microstrip antenna is necessary for the reason that thecapability of noise suppression and sensitivity of the RF system can be upgraded evidently.Moreover, a full-differential RF front-end can be constructed easily with the seamless integrationof the antenna and the chip, resulting in lower loss and circuit complexity.Under this background, this paper has launched a study into the differential integrationtechnology of differential microstrip antenna, including the technique to miniaturize theantenna’s size, obtain the capability of multi-frequency radiation and also the characteristics ofcircular polarization. All the works are arranged as follows:Firstly, one compact differential microstrip antenna operating at the WLAN frequency of2.4GHz is proposed. By using slotted patch, the size of the proposed antenna is reduced to about66%of that of the traditional antenna. Moreover, to further reduce the antenna’s size, bothslotted patch and slotted ground plane are introduced to realize a very compact antenna, whosesize is only45%of that of the traditional antenna.Secondly, a novel differential dual-band microstrip antenna using two-layer structure isproposed. It can work at DCS1800and WLAN2.4GHz simultaneously. The high frequency ismainly affected by the up layer patch while the low frequency is affected by the low layer patch.The simulated results show that the proposed antenna can meet the requirement.Finally, a novel differential circular polarization antenna is designed. The simulated resultsshow that right-hand circular polarization wave is successfully obtained.