Chelmsford, Mass.Suitable for driving I/Q (in-phase and quadrature) stages, and balanced mixers, Hittite Microwave Corp.'s seven active x2 frequency multipliers can let your circuits achieve continuous output frequency coverage from 5-GHz to 46-GHz. Each of these multipliers ensures fundamental frequency and sub-harmonic suppression.
All are based on GaAs (gallum arsenide) PHEMT (pseudomorphic high electron mobility transistor) device technologies.
Hittite's HMC576 (priced at about $23), HMC578, and HMC579 active x2 multipliers are offered in bare die form. They comprise an input amplifier, a low conversion-loss frequency doubler, and an output buffer amplifier.
They operate with an input drive level of +3-dBm (2-mW) and provide between +12-dBm (16-mW) and +16-dBm (40-mW) of output power. By using these three multipliers, you can achieve continuous output frequency coverage from 18-GHz to 46-GHz.
For applications where a SMT (surface-mount technology) RoHS-compatible (Restriction of Hazardous Substances in Electrical and Electronic Equipment) package is required, Hittite's HMC575LP4, HMC576LC3B, HMC577LC4, and HMC578LC3B (priced at about $25) active x2 multipliers provide output frequencies from 5-GHz to 33-GHz.
They exhibit output power capability ranging from +12-dBm (16-mW) to +21-dBm (125-mW). That enables them to directly drive many of Hittite's doubly-balanced mixers, and I/Q MMIC (monolithic microwave IC) mixers.
The HMC578LC3B, for example, can drive the LO (local oscillator) port of Hittite's HMC560LM3; it's a 24-GHz to 40-GHz double-balanced mixer.
Compensating For Filter Loss
The HMC578LC3B also provides several dB of output power margin, giving you the option of placing a bandpass filter between the two components if required. The extra margin can make up for filter loss.
Samples and evaluation boards for all SMT-packaged products are available from stock.
Click here for an HMC576 data sheet (in Adobe Acrobat .PDF format).
Click here for an HMC578 data sheet (also in Adobe Acrobat .PDF format).
Click here for an HMC579 data sheet (in Adobe Acrobat .PDF format).
Click here for an HMC575LP4 data sheet (in Adobe Acrobat .PDF format).
Click here for an HMC576LC3B data sheet (in Adobe Acrobat .PDF format).
Click here for an HMC577LC4 data sheet (in Adobe Acrobat .PDF format).
Click here for an HMC578LC3B data sheet (in Adobe Acrobat .PDF format).
For further details contact Hittite Microwave Corp., 20 Alpha Road, Chelmsford, Mass. 01824. Phone: 978-250-3343. Fax: 978-250-3373. E-mail: firstname.lastname@example.org
Hittite Microwave, 978-250-3343, www.hittite.com