Analysis And Optimization For Antenna And Spiral Inductor Of Radio Frequency Units

Wireless communication system has been widely applied in every field of our society,and the miniaturization and integration of PCB antenna has become an inevitable trend of related researches.Meanwhile,in the RF transceiver units,it is a truly effective method to use the spiral inductor with high quality factor for improving the transceiver's performance.Therefore,this paper discussed the following four aspects of contents based on the theory of radiation principle of the antenna oscillator and parametric model of the spiral inductor.1.The characteristic parameters of the bluetooth microstrip antenna and the inverted F antenna in this paper,which were used to determine the antenna's initial design dimensions and research the influences of the length and width of radiation patch,the location of the feed point and the distance between the antenna's arms on resonant frequency and return loss of antenna itself.According the mentioned researches,a size optimization scheme was summarized for the conclusion.2.Besides,the paper set up the model of coil inverted F antenna by referring the size of the antenna AN043 which was developed by TI Corporation.By studying this model,the paper analyzed the effects on the resonance frequency,which was affected by seven factors,such as the width of upper and lower curve.In additional,the paper innovatively proposed a parameter optimization strategy for the multi-parameter antenna.3.In order to verify the influence of the mentioned parameters on antenna's resonance frequency and return loss,the optimized antennas beside antenna AN043 were processed as PCB samples,which have been through the RF OTA passive test.The test results show that the parameter optimization strategy achieves the miniaturization of bluetooth antenna under the premise that performance meets the bluetooth specification,which verify the feasibility of the optimized antenna strategy.4.Finally,in order to explore the factors that affect the performance of the spiral inductor,seven different sizes of the spiral inductor were designed to research the impact on the quality factor and intrinsic inductance caused by geometric parameters,such as circle numbers and line spacing.The research results perform a significant role for optimition of the spiral inductor.