A K-BAND BALANCED SUBHARMONICALLY PUMPED IMAGE REJECTION MIXER USING 0.15-mu m GaAs pHEMT TECHNOLOGY

作者：Ke Po Yu; Chiu Hsien Chin^*; Kuo Che Yu; Fu Jeffrey S; Chiang Yi Chyun

来源：Microwave and Optical Technology Letters, 2011, 53(3): 485-488.

DOI：10.1002/mop.25781

• image rejection mixer
• quadrature coupler
• subharmonically pumped mixer
• three-conductor-line
• lumped elements

This work presents a K-band balance single side-band subharmonically pumped image rejection diode mixer (SHIRM). It uses lumped elements and three-conductor-line quadrature couplers and is fabricated in a 0.15-mu m GaAs process. The SHIRM is realized in size reduction by using two antiparallel diode pairs for frequency mixing. The three-conductor-line bending coupler is 55% reduction in size compared to the nonbending one for radio frequency port. and lumped elements realization is 62% smaller in size than the quarter-wavelength line for local oscillator port. The proposed circuit with a symmetric layout provides good matches on amplitude and phase performances. The measured results exhibit a minimum conversion loss of 13 dB, a maximum image rejection ratio of 19 dB. All ports isolations are better than 10 dB. The chip area is only 1.5 X 1 mm(2).

• 出版日期2011-3
• 单位长春大学