GSM Filter Passes 875 To 1010 MHz

April 29, 2010

Model ZX75BP-942+ is a compact ceramic resonator bandpass filter from Mini-Circuits with passband of 875 to 1010 MHz. The filter offers low passband insertion loss of 1.1 dB and a rejection band that extends to 7 GHz. The insertion loss remains stable within 0.2 dB across the full operating temperature range. The rejection is 30 dB at 750 and 1160 MHz and 49 dB at 690 and 1250 MHz. With the close-in signal rejection needed for use in GSM cellular base station applications, the design includes a multisection lowpass filter to prevent second-harmonic re-entry. The filter measures 2.05 x 1.18 x 0.46 in. with SMA connectors and flange.

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.