Title :
The Research on the Frequency Drift of the Coaxial and Circular Waveguide Resonator
Author :
Sui, Qiang ; Zhang, Liang ; Jia, Hongtao
Author_Institution :
Inf. Eng. Sch., Commun. Univ. of China, Beijing, China
Abstract :
The UHF adjacent channel combiner is in a great demand because of the shortage of the frequency resource along with the development of the "China Mobile Multimedia Broadcasting (CMMB)" system and the "Digital Television Terrestrial Broadcasting (DTTB)" system. The high-selectivity band-pass filter is a must for the adjacent channel combiner. The characteristics of the frequency drift caused by the temperature of the coaxial and waveguide resonators, which were used to construct the filter, were investigated in this paper. Two types of the coaxial resonator and two types of cylinder waveguide resonator were studied. The main reason of the coaxial resonant frequency drift was found out. Some frequency drift compensation methods were proposed as well in this paper.
Keywords :
UHF filters; band-pass filters; circular waveguides; digital audio broadcasting; digital video broadcasting; power combiners; resonator filters; CMMB system; China Mobile Multimedia Broadcasting; DTTB system; Digital Television Terrestrial Broadcasting; UHF adjacent channel combiner; circular waveguide resonator; coaxial resonator; frequency drift compensation method; high-selectivity band-pass filter; Band pass filters; Coaxial components; Digital TV; Digital multimedia broadcasting; Frequency; Multimedia communication; Multimedia systems; Resonator filters; TV broadcasting; Temperature;
Conference_Titel :
Management and Service Science, 2009. MASS '09. International Conference on
Conference_Location :
Wuhan
Print_ISBN :
978-1-4244-4638-4
Electronic_ISBN :
978-1-4244-4639-1
DOI :
10.1109/ICMSS.2009.5305842
