MMIC Filters Tune 1.0 To 7.6 GHz

March 11, 2010

A line of monolithic-microwave-integrated-circuit (MMIC) tunable filters from Hittite Microwave Corp. covers applications from 1.0 to 7.6 GHz. The varactor-tuned filters, the firm's 25th product line, include models HMC881LP5E and HMC882LP5E, tunable, seventh-order, lowpass filters with adjustable cutoff points from 2.2 to 4.0 GHz, and 4.5 to 7.6 GHz, respectively. They are tuned by means of 0 to 14 V control signals and maintain stopband rejection of at least 35 dB beyond 30 GHz. Models HMC890LP5E and HMC891LP5E are tunable, third-order, bandpass filters with adjustable passband frequency and bandwidth by means of independent voltage controls. The two units offer adjustable center frequencies from 1 to 2 GHz and 2.0 to 3.9 GHz, respectively. Bandwidths can be adjusted within 6 percent of the center frequency. The bandpass filters maintain stopband rejection of at least 30 dB to 9 GHz. The four filter models are supplied in 5 x 5 mm QN surface-mount packages.

About the Author

Jack Browne

Technical Contributor

Jack Browne, Technical Contributor, has worked in technical publishing for over 30 years. He managed the content and production of three technical journals while at the American Institute of Physics, including Medical Physics and the Journal of Vacuum Science & Technology. He has been a Publisher and Editor for Penton Media, started the firm’s Wireless Symposium & Exhibition trade show in 1993, and currently serves as Technical Contributor for that company's Microwaves & RF magazine. Browne, who holds a BS in Mathematics from City College of New York and BA degrees in English and Philosophy from Fordham University, is a member of the IEEE.