| Millimeter wave applications such as high-speed wireless connections require modular, compact-size, low-cost and high-performance systems. In order to realize a complete receiver satisfying those requirements, compact stacked multilayered designs are presented in this thesis.;First, high-gain compact stacked multilayered Yagi designs are proposed and demonstrated at 5.8 GHz. The structure makes use for the first time of vertically stacked Yagi-like parasitic director elements that allow easily obtaining a simulated gain of 12 dBi. Two different antenna configurations are presented, one based on dipole geometry for single polarization, and the other on a circular patch to achieve dual polarization. Measured results of the fabricated antenna prototypes are in good agreement with simulated results.;Second, based on the above-demonstrated principle, the antenna is redesigned and adapted for 60 GHz applications, and a novel design showing for the first time an array of Yagi elements in millimeter wave stacked structure is presented. An analysis is performed to define the structure limits. The measured element attains 11 dBi of gain. The proposed 4x4 array has a size of 50x50x60 mm3, and reaches a measured gain of 18 dBi over 7% of bandwidth. An alternative configuration of the array using angled Yagi antenna elements allows for a significant improvement of the side lobe level without a visible impact on the gain. The proposed antennas present excellent candidates for integrated low-cost millimeter-wave systems that require small footprint.;Third, a novel dual layered six-port front-end circuit using the Substrate Integrated Waveguide (SIW) technology is presented and demonstrated. The six-port architecture makes use of multilayer couplers, providing a wide coupling area through two slots; a new broadband SIW phase shifter composed of two H-plane stub lines and one reference line; and two SIW power dividers. Simulation and measurement results show that the proposed six-port circuit can easily operate at 60 GHz for V-band system applications. The complete QPSK demodulation is tested through the ADS simulation platform to prove the good performances of the designed circuits. |
