Title :
Modeling and Design of Microstrip Patch Antenna-in-Package for Integrating the RFIC in the Inner Cavity
Author :
Li Li ; Xinwei Chen ; Yi Zhang ; Liping Han ; Wenmei Zhang
Author_Institution :
Coll. of Phys. & Electron., Shanxi Univ., Taiyuan, China
Abstract :
This letter presents the circuit model of the antenna-in-package (AiP) for integrating the RFIC in the inner cavity. The closed-form expression for the inductance of the ground via is provided in the case that two ground vias are arranged under the nonradiating edge of the AiP. The new expression takes account of the radius and length of the vias, the relative positions of vias, and the distances between via holes and the feeding point of the antenna. Based on the circuit model, the influences of vias on the performance of the AiP are analyzed. It is found that the bandwidth of the AiP can be effectively improved by properly arranging two via holes under the nonradiating edge of the antenna. Finally, an AiP with the center frequency of 5.12 GHz is realized, and a bandwidth of 400 MHz is obtained. The calculated results are in agreement with the simulated and measured.
Keywords :
integrated circuit packaging; microstrip antennas; microwave antennas; radiofrequency integrated circuits; RFIC; bandwidth 400 MHz; feeding point; frequency 5.12 GHz; ground via; inductance closed form expression; inner cavity; microstrip patch antenna-in-package; nonradiating edge; via holes; Antenna measurements; Inductance; Integrated circuit modeling; Microstrip; Microstrip antennas; Substrates; Antenna-in-package; RF transceiver; equivalent circuit; via holes;
Journal_Title :
Antennas and Wireless Propagation Letters, IEEE
DOI :
10.1109/LAWP.2014.2312420