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vor 9 Jahren

3-2012

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HF-Praxis 3-2012

Grundlagen Tabelle 2:

Grundlagen Tabelle 2: Typische Kennwerte des Kopplers TCP-2-10 Tabelle 3: Typische Kennwerte des Kopplers TCP-2-10-75 Tabelle 4: Typische Kennwerte des Kopplers TCP-2-25 Tabelle 5: Pin-Belegung der drei Kopplertypen 48 hf-praxis 3/2012

Products MMIC Band Pass Filter Chip Tunes from 19 to 38 GHz Hittite Microwave Corporation has introduced a new Tunable MMIC Band Pass Filter which is ideal for hybrid and microwave integrated circuit (MIC) applications in wideband test and measurement equipment, communication systems and electronic warfare (EW) subsystems to 38 GHz. This analog voltage tuned, solid state MMIC filter is insensitive to environmental conditions, and represents 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. The 3 dB filter bandwidth is approximately 18%, while the 20 dB bandwidth is approximately 35%. The pass band center frequency of the HMC899 is controlled by an analog tune voltage between 0 and 14 V with a tuning speed of 200 ns. The HMC899 exhibits excellent microphonic immunity due to the monolithic design, and provides a dynamically adjustable filtering solution in advanced communications applications. Compared to physically large switched filter banks and cavity tuned filters the HMC899 can reduce the required filtering circuit area by up to 90 %. 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. Samples and evaluation PC boards for all SMT packaged products are available, released data sheets are available on-line at www.hittite.com. ■ Hittite Microwave Corporation MMIC Divide-by-3 Sets Bandwidth Benchmark Hittite Microwave Corporation announced the release of a new low noise programmable frequency divider which is ideal for use in signal generation architectures found in test equipment, laboratory systems and various military applications. The HMC861LP3E is a Low Noise Programmable Frequency Divider which can be programmed to divide-by-1 or divide-by-3, and accepts input frequencies from 100 MHz to 13 GHz. The HMC861LP3E exhibits extremely low additive phase noise of -152 dBc/Hz in divide-by-1 mode, and -153 dBc/Hz in divide-by-3 mode. This versatile frequency divider accepts input signal levels from -10 to +10 dBm, while delivering +2 dBm of output power. The wide input frequency and power level ranges, and the low single sideband phase noise make the HMC861LP3E ideal for synthesizer and phase locked loop applications in wideband and high data rate communication systems. The division ratio of the HMC861LP3E is selected by a single CMOS compatible input and the device is powered from a +5 V supply. The HMC861LP3E is the only known MMIC divide-by-3 available in the marketplace which operates to 13 GHz. The HMC861LP3E is conveniently housed in a miniature 3x3 mm RoHS compliant QFN leadless SMT package and is specified for operation over -40 °C to +85 °C. Samples and evaluation PC boards for all SMT packaged products are available. Released data sheets are available on-line at www. hittite.com. ■ Hittite Microwave Corporation www.hittite.com hf-praxis 3/2012 49

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