Title :
HTS AMPS-A and AMPS-B filters for cellular receive base stations
Author :
Soares, E.R. ; Raihn, K.F. ; Davis, A.A. ; Alvarez, R.L. ; Marozick, P.J. ; Hey-Shipton, G.L.
Author_Institution :
Supercond. Technol. Inc., Santa Barbara, CA, USA
fDate :
6/1/1999 12:00:00 AM
Abstract :
The multiple, interleaved pass band nature of the AMPS cellular system provides an excellent opportunity for high performance HTS filter technology for base station reverse link applications. The 25 MHz spectrum is divided into 4 unequal bands, 2 each for the A and B operators. For AMPS-A, the two band pass filters are connected in parallel, while for AMPS-B a band pass filter is cascaded with a band reject filter. All band pass filters have finite transmission zeros and the band reject filter is designed to have an equal ripple stop band. The design and performance of high selectivity filters for this application is described.
Keywords :
band-pass filters; band-stop filters; cellular radio; high-temperature superconductors; radio equipment; superconducting filters; AMPS cellular receive base station; AMPS-A filter; AMPS-B filter; HTS filter; band pass filter; band reject filter; reverse link; Band pass filters; Base stations; Digital modulation; Filtering theory; Frequency; High temperature superconductors; Low-noise amplifiers; Radio spectrum management; Superconducting filters; Superconducting materials;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
