Representing a space saving alternative to mechanically tuned and MEMS based filter solutions, the HMC899 tunable MMIC band pass filter (BPF) features a user selectable pass band frequency range of 19 and 38 GHz. When compared to physically large switched filter banks and cavity tuned filters the MMIC which occupies only 3 mm2 can reduce the required filtering circuit area by up to 90 %.
The 3-dB filter bandwidth is approximately 18%, while the 20-dB bandwidth is approximately 35%. The pass band center frequency of the device is controlled by an analog tune voltage between 0 and 14 V with a tuning speed of 200 ns.
Return losses for the HMC899 are typically 10 dB, while residual phase noise is as low as 157 dBc/Hz at 1-MHz offset. For applications which a require a surface mount compatible solution, this same filter is available in a RoHS compliant 4 x 4 mm QFN SMT package as the HMC899LP4E. ($98 ea/10-99, Evaluation PCB, $689 available now)
By Christina Nickolas
Hittite Microwave , Chelmsford , MA , United States
Sales 978-250-3343
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