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专利名称：Narrow bandpass dielectric resonator filter
with mode suppression pins
发明人：Slawomir J. Fiedziuszko,Craig A. Ziegler申请号：US06/758631申请日：19850708公开号：US04692723A公开日：19870908
摘要：An extremely narrow-band bandpass electromagnetic filter comprises awaveguide (1) dimensioned below cutoff and having two or more active sections (30) eachcontaining a dielectric resonator (6). The number of resonators (6) corresponds to thenumber of poles of filtering. The physical dimensions of the waveguide (1) can
advantageously be further reduced by means of passive coupling means (40), where thewaveguide (1) cross-section is smaller than in the active sections (30). Each passivecoupling means (40) inductively couples adjacent active sections (30). Mode suppressionrods (10) electrically connect opposing waveguide walls (2, 3) midway between each pairof adjacent dielectric resonators (6). Preferred embodiments are illustrated, in which theresonators (6) are tranversely oriented within the waveguide (1). Electromagnetic energytravels within the waveguide (1) in a single TE. sub.10 evanescent mode (TE.sub.01&dgr;within the resonators (6)). Dielectric tuning means (9) are generally aligned along theprincipal axis of each resonator (6). A number of such filters, exhibiting extremely narrowbandwidth, low insertion loss, and high Q, have been successfully built.
申请人：FORD AEROSPACE & COMMUNICATIONS CORPORATION
代理人：Edward J. Radlo,Keith L. Zerschling
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