Image courtesy of MiniCircuits

Filters Forego Reflections to 21 GHz

Sept. 21, 2016
Absorptive filters from Mini-Circuits provide essentially reflectionless performance from DC to 21 GHz.

Microwave filters have been known to generate their share of reflected signals, often suffering from out-of-band standing waves as a result. Fortunately, absorptive/reflectionless filters from Mini-Circuits provide essentially reflectionless performance from DC to 21 GHz. They are available in lowpass, highpass, and bandpass configurations with stopbands to 35 GHz. As one example, model XBF-282+ is a reflectionless bandpass filter with passband of 2350 to 3150 MHz and stopbands of DC to 1810 MHz and 3.8 to 20.0 GHz. Passband VSWR is 1.20:1 while stopband VSWR, a measure of reflections, is impressive at only 1.50:1.

For another example, model XLF-982+ is a lowpass filter with passband of DC to 9.8 GHz. It exhibits 14-dB rejection across a stopband from 19 to 22 GHz. The passband VSWR is 1.20:1, with passband insertion loss of less than 1 dB from DC to 9.8 GHz. The insertion loss at 13 GHz is still less than 3 dB. The reflectionless filters are supplied in QFN packages measuring 3 {MULT} 3 mm.

The reflectionless filters along with a wide range of active and passive RF/microwave components and programmable test equipment are on display at Mini-Circuits’ EDI CON booth #215. 

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.

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