摘要:
A dielectric resonator device includes a dielectric substrate (1). Electrode films (2,3) are formed on the front (1A) and back (1D) surfaces of the dielectric substrate (1), respectively. A TE010-mode resonator is constituted by two circular openings (4A,4B) which oppose each other and which are formed in the electrode films (2,3). Two opposing slots (5A,5B) formed in the electrode films (2,3) constitute a planar dielectric transmission line (PDTL). The PDTL is connected to the TE010-mode resonator. An excitation section (6) is formed by extending two portions (6A;6B) of each electrode film (2,3) on two side of each slot (5A,5B) into each opening (4A,4B).
摘要:
A high-frequency circuit device includes a dielectric substrate (1). A planar conductor (2) is provided on each of top and bottom surfaces (1A,1B) of the dielectric substrate and a slot line (4) is formed on the top surface. Also, undesired-wave propagation preventing circuits (5), each including multistage band-elimination filters (6), are provided on the top surface of the dielectric substrate, with the slot line therebetween. Each of the band-elimination filters includes two conductive lines and a resonator which is provided at a portion of one of the conductive lines and which includes two spiral lines. Accordingly, propagation of an undesired wave of the band whose center is the resonance frequency of the resonator can be prevented.
摘要:
A high-frequency circuit device includes a dielectric substrate (1). A planar conductor (2) is provided on each of top and bottom surfaces (1A,1B) of the dielectric substrate and a slot line (4) is formed on the top surface. Also, undesired-wave propagation preventing circuits (5), each including multistage band-elimination filters (6), are provided on the top surface of the dielectric substrate, with the slot line therebetween. Each of the band-elimination filters includes two conductive lines and a resonator which is provided at a portion of one of the conductive lines and which includes two spiral lines. Accordingly, propagation of an undesired wave of the band whose center is the resonance frequency of the resonator can be prevented.
摘要:
A radio-frequency amplifier comprises slot lines formed in a top electrode which are bent to define matching segments that are perpendicular to transmitting segments. The matching segments have a length corresponding to one-quarter of the wavelength of a signal to be amplified and are at least partially perpendicular to the transmitting segments. A DC-cut circuit comprising slot lines is connected to the matching segments, an FET is connected to the transmitting segments and the matching segments, and respective matching circuits serve as an input unit and an output unit of the FET. Source terminals of the FET are connected to parts of a top electrode that do not lie between the segments. A drain terminal and a gate terminal are connected, to be electrically separated from each other, to parts of the top electrode, which are electrically separated from the source terminals by the DC-cut circuit, the transmitting segments, and the matching segments.
摘要:
A radio-frequency amplifier comprises slot lines formed in a top electrode which are bent to define matching segments that are perpendicular to transmitting segments. The matching segments have a length corresponding to one-quarter of the wavelength of a signal to be amplified and are at least partially perpendicular to the transmitting segments. A DC-cut circuit comprising slot lines is connected to the matching segments, an FET is connected to the transmitting segments and the matching segments, and respective matching circuits serve as an input unit and an output unit of the FET. Source terminals of the FET are connected to parts of a top electrode that do not lie between the segments. A drain terminal and a gate terminal are connected, to be electrically separated from each other, to parts of the top electrode, which are electrically separated from the source terminals by the DC-cut circuit, the transmitting segments, and the matching segments.