Mitsubishi Denki Kabushiki Kaisha

Kousaku Yamagata

Kenji Yoshida

Kenji Itoh

Naofumi Yoneda

Moriyasu Miyazaki

Koichiro Misu

Koji Ibata

Masao Koshinaka

Kouji Murai

Isao Murase

Filter circuitry is provided with a series element and a parallel element. The filter circuitry transmits signals that fall within a certain passband and attenuates signals that don't fall within the certain passband. The series element is comprised of a resonance element having antiresonance characteristics, and the parallel element is comprised of a series circuit including an inductor and a capacitor.

Filter circuit with series and parallel elements

The waveguide group branching filter according to the present invention is formed by boring out of two metal blocks constituent circuits including a circular-to-square waveguide multistage transformer, the branch waveguide polarizer/branching filter, a rectangular waveguide multistage transform, the rectangular waveguide H-plane T-branch circuit, and waveguide band-pass filtersand; radio waves Vand H, which have their polarization planes vertical and horizontal, respectively, to the branching plane of the branch waveguide polarizer/branching filterin a certain frequency band f, and a radio wave Vof the same polarization plane as that of the radio wave Vin a frequency band fhigher than the frequency band fare incident to an input port P, and the radio wave Vis emitted from an output port P, the radio wave Hfrom an output port Pand the radio wave Vfrom an output port P

Waveguide group branching filter

On each surface of a dielectric substrate, arranged are a first conductor line pattern having a plurality of first line segments and a second conductor line pattern having a plurality of second line segments. Ends of each first conductor line segment overlap the second conductor line segments, and the first and second line segments are connected via through-holes, thereby forming a single spiral conductor line. Each second conductor line segment for connecting adjacent first conductor line segments has a pair of end parts connected to the first conductor line segments via through-holes and a halfway part having a smaller width.

Multi-layered inductance element

Growing community of inventors

Tokyo, Japan

Kousaku Yamagata