Ta-Yeh Lin

Design of Dual-Band Millimeter-Wave Antenna-in-Package Using Flip-Chip Assembly

A dual-band antenna-in-package for millimeter-wave (mmW) applications is presented in the paper. The proposed antenna, which consists of a radiating slot and an air-filled cavity, is fed by a microstrip loaded with two tuning open-circuited stubs through a coupling C-shape aperture to achieve dual-band characteristics. The air-filled cavity, which is formed by the space between CMOS chip and integrated passive device substrate after flip-chip assembly process, can reduce loss and improve antenna gain. Simulation and measurement regarding antenna reflection coefficient, radiation pattern, and peak gain are conducted for design validation. The measured results show that the antenna can operate in V-band and E-band, and the impedance bandwidths with the reflection coefficient less than -10 dB are 6.1% and 5.8%, respectively. The measured gains are -2 dBi at 58 GHz and 0.3 dBi at 77 GHz, respectively. The proposed antenna is well suited for dual-band mmW high-data-rate wireless communication systems.

High-gain 60-GHz on-chip PIFA using IPD technology

A first high-gain 60-GHz PIFA implemented with a silicon substrate Integrated Passive Device (IPD) technology is presented in the paper. The PIFA which was used with L-shape ground structure could change the radiation pattern and enhance the antenna gain. Simulation and measurement regarding antenna reflection coefficient are conducted for design validation. The measured results show that the antenna can operate in 60-GHz band, and the impedance bandwidth with |S11| less than -10 dB is 11%. The measured gain is 5 dBi at 60 GHz. The total chip size is 1.05 × 1.25 mm2. The proposed design is well suited for System-in-Package 60-GHz radio front-ends.

Dual-band slot antenna design with a thin cavity

A design of dual-band cavity-backed slot antenna is presented for GPS and S-band radar applications. In the design, a very thin cavity (0.017 λ0 in thickness at 1.575 GHz) is used to achieve unidirectional radiation. The dual-band responses of the antenna are excited by the slot resonance at 1.575 GHz and waveguide transition effect at 2.4 GHz. Even with very small cavity thickness, reasonable impedance bandwidths are obtained as 1.6% (26 MHz) at 1.575 GHz and 8.4% (203 MHz) at 2.4 GHz. The proposed slot can also be loaded with a spurline to adjust the antenna centre frequency and the phase of the radiated field. All designs in this paper have been validated with experiments. Satisfactory results have been obtained.

Design of a V-band 2 × 2 dual-polarization dielectric resonator antenna array

A high gain V-band on-chip 2×2 dual-polarization dielectric resonator antenna (DRA) array in silicon substrate based on Integrated Passive Device (IPD) technology is presented in the paper. In the proposed structure, dielectric resonator (DR) was fed by using wire-bond structures for bandwidth and antenna efficiency improvement. The simulation and measurement regarding the DRA element reflection coefficient and isolation are conducted for design validation. The simulated results show that the antenna can operate in V-band, and the impedance bandwidth with |S11| less than −10 dB is from 55.7 GHz to 65.8 GHz. The peak gain is 10.3 dBi. The proposed design is well suited for System-in-Package millimeter-wave radio front-ends.

Compact antenna design with bandwidth enhancement

A novel wideband compact antenna design at the edge of the ground plane is presented. The design, mainly composed of an edge-coupled capacitor as a tuning mechanism, can be used as building blocks for future multi-band antennas with reconfigurable operation in which the capacitor is replaced by a varactor. The antenna is first designed with an inductive feed. The corresponding equivalent circuit is also presented, in which the contribution of each parts of the antenna are explained. The antenna can be miniaturized by tuning the edge-coupled capacitor and the inductive effect between the antenna structure and the ground plane. The capacitive feed mechanism is later introduced to replace the original inductive feed. With the capacitive feed, the impedance bandwidth of the antenna can be significantly enhanced from 9% (2.15-2.41 GHz) to 49.6% (1.695-2.763 GHz), while the size of the antenna is 10×11 mm2.

Multi-band slot antenna design using branch edge

A design of multi-band antenna using a single slot with branch edge is presented in this paper. The antenna is employed at the edge of the printed circuit board and loaded with circuit components. With the folded slot and circuit components, the antenna area has been miniaturized within 1/16 λ. The slot antenna is decomposed into several sub-networks, and the corresponding equivalent circuit is presented. The design equation can be acquired from the equivalent circuit by using the resonant condition. A dual-band design is realized, measured, and validated at 1.575 GHz and 2.45 GHz, respectively. The design procedure of the antenna can be extended into multi-band design.