Miniaturized hybrid antenna combining Si and IPDtm technologies for 60GHz WLAN applications
Résumé
This paper presents the design of a packaged antenna including glass substrate. A square patch antenna is implemented on BiCMOS B9MW technology (Low Resistivity (LR) Si - p = 12 ohms.cm). The described solution solves the interconnection problem between Silicon Integrated Circuits (ICs) and the antenna. The excitation structure is integrated on Silicon substrate using conventional process, thus reducing insertion losses usually caused by flip-chip or assembling techniques. The second advantage of this solutions is the cointegration of the coupling slot with the RF front-end. This permits to match the antenna input impedance to the PA output impedance, with consequently improved power budget efficiency. This antenna achieves a simulated gain of 5dBi at 60GHz and a relative bandwidth of 8%. A preliminary antenna on alumina and glass substrates has been realized in order to verify the flipchip assembly process. The measurements results are in good agreement with simulation.