3.95 GHz to 6.9 GHz, Tunable Low-Pass Filter

The HMC882A is a monolithic microwave integrated circuit (MMIC) low-pass filter that features a user-selectable cutoff frequency (f3dB). The cutoff frequency can be varied from 3.95 GHz to 6.9 GHz by applying a single analog tuning voltage between 0 V and 14 V. This low-pass filter provides a low 3 dB insertion loss, 13 dB return loss, and >20 dB stopband attenuation at 1.28 × f3dB GHz. This tunable filter can be used as a much smaller alternative to physically large switched filter banks and cavity tuned filters. The HMC882A has excellent microphonics due to the monolithic design and low residual phase noise of −165 dBc/Hz, and provides a dynamically adjustable solution in advanced communications applications. The low-pass tunable filter is packaged in a RoHS compliant, 5 mm × 5mm LFCSP package.

Applications

* Testing and measurement equipment

* Military radar and electronic warfare/electronic counter measures (ECMs)

* Satellite communication and space

* Industrial and medical equipment

* Amplitude settling time: 200 ns* Wideband rejection: ≥35 dB* Single-chip replacement for mechanically tuned designs* RoHS compliant, 32-lead, 5 mm × 5 mm LFCSP package