Title :
High gain active microstrip antenna for 60-GHz WLAN/WPAN applications
Author :
Kärnfelt, Camilla ; Hallbjörner, Paul ; Zirath, Herbert ; Alping, Arne
Author_Institution :
Dept. of Microtechnol. & Nanosci., Chalmers Univ. of Technol., Goteborg
fDate :
6/1/2006 12:00:00 AM
Abstract :
A 60-GHz active microstrip antenna design comprising a three-stage pseudomorphic high electron mobility transistor amplifier integrated with a high gain antenna on an alumina substrate is presented. The amplifier has 18-dB gain and is ribbon bonded to the substrate on which the antenna is defined. The antenna is a microstrip array antenna with a simple etched pattern for producibility at high frequencies. Two antenna layouts are designed, for different coverage areas: a single array having 13.4-dBi directivity and a double array with 14.6-dBi directivity. Antenna losses are approximately 1-2 dB, giving antenna gains of about 12 and 13 dBi, respectively. Mechanical simplicity is achieved with this design, and unnecessary transitions are avoided. Measurements are performed on amplifier and antenna separately, as well as on the integrated design. Amplifier chips with and without benzocyclobutene passivation are fabricated and measured for comparison
Keywords :
MIMIC; active antennas; high electron mobility transistors; microstrip antennas; millimetre wave antennas; personal area networks; wireless LAN; 18 dB; 60 GHz; active microstrip antennas; benzocyclobutene passivation; monolithic-microwave integrated-circuit amplifiers; pseudomorphic high electron-mobility transistor; wireless local area network; wireless personal area network; Antenna arrays; Antenna measurements; Electron mobility; HEMTs; MODFETs; Microstrip antenna arrays; Microstrip antennas; PHEMTs; Semiconductor device measurement; Wireless LAN; 60 GHz; Active antenna; GaAs; microstrip antenna array; millimeter wave; monolithic-microwave integrated-circuit (MMIC) amplifiers; pseudomorphic high electron-mobility transistor (pHEMT); wireless local-area network (WLAN); wireless personal area network (WPAN);
Journal_Title :
Microwave Theory and Techniques, IEEE Transactions on
DOI :
10.1109/TMTT.2006.872923
