Snell Jr William Walter: Orthogonal resonant filter for planar transmission lines. Bell Telephone Laboratories Incorporated, Hurewitz D L, March 12, 1974: US3796970 (152 worldwide citation)

The conductor pattern on a dielectric substrate includes a rectangular element of finite thickness whose two surface dimensions are chosen so that each is one-half the wavelength of a desired frequency. Accordingly, the element will support two resonant orthogonal standing waves and external couplin ...

Marcatili Enrique Alfredo Jose: Improvements in or relating to dielectric waveguide circuit elements. Western Electric Co, November 29, 1972: GB1298387-A (144 worldwide citation)

1298387 Dielectric Waveguides WESTERN ELECTRIC Co Inc 24 April 1970 [25 April 1969] 19716/70 Heading G2J Band pass/band rejection filters are formed by coupling dielectric waveguides to dielectric disc shaped, resonant cavities. In the band rejection filter of Fig. 2A, a looped guide 81, 84 induces ...

Inoue Etsuteru, Makino Hitoshi: Antenna system. Soshin Electric, August 11, 2005: JP2005-217822 (123 worldwide citation)

PROBLEM TO BE SOLVED: To provide an antenna system which realizes the miniaturization of antennas compatible with a plurality of frequency bands, makes a frequency band of each antenna broad, ensures isolation between the antennas, and enables the selectivity of the antenna shape to be extended ther ...

Improvements in or relating to waveguide coupling devices. Marie G R P, February 21, 1962: GB889856-A (102 worldwide citation)

889,856. Waveguide band-separation filters. MARIE, G. R. P. Nov. 29, 1960 [Dec. 4, 1959], No. 40987/60. Class 40(8). A coupling device between a circular waveguide and a number of rectangular waveguides comprises dielectric lenses equal in number to the rectangular waveguides arranged to completely ...

Marcatili Enrique A J: Optical circuits. Bell Telephone Laboratories Incorporated, June 29, 1971: US3589794 (78 worldwide citation)

This application describes a variety of circuit components for use at optical frequencies. Each of the components is formed from one or more transparent dielectric strips embedded in a transparent substrate of slightly lower refractive index. By suitably shaping and locating the guiding strips, powe ...

Hoer Cletus A: Broad-band lumped-element directional coupler. The United States of America represented by the Secretary of the Navy, October 24, 1972: US3701057 (45 worldwide citation)

A broad-band lumped element directional coupler for measuring either the ward or reflected power in a coaxial transmission line. A resistive voltage divider is coupled to the center conductor of a transmission line with a capacitor to keep the phase of the voltage sampling circuit equal to the phase ...

Bruene Warren B: Transmitter combiner having coupled tuned circuits. Collins Radio Company, May 22, 1973: US3735289 (44 worldwide citation)

A hybrid coupler for coupling a plurality of transmitters to a single antenna. Inductive coupling through use of variable length transmission line stubs affords tuning over a wide transmission frequency range.

Atokawa Masayuki: Dielectric filter, dielectric duplexer and communication apparatus. Murata Manufacturing Co, December 2, 1998: EP0881700-A1 (41 worldwide citation)

A dielectric resonator (5) is electrically connected to an input terminal (1) through a coupling capacitor (C1). A dielectric resonator (6) is electrically connected to an output terminal (2) through a coupling capacitor (C3). The dielectric resonators (5, 6) are electrically connected to each other ...

Horii Hiroyuki C O Oki Electri, Shimizu Kohichiro C O Oki Elec, Yasuoka Toshikazu C O Oki Elec, Iwata Masao C O Oki Electric I, Gunji Katsuhiko C O Oki Electr, Komazaki Tomokazu C O Oki Elec: Lc-type dielectric filter and duplexer.. Oki Electric, February 15, 1995: EP0638953-A1 (41 worldwide citation)

An LC-type dielectric filter and a duplexer are disclosed. The filter (10) comprises a multilayer substrate. Each layer (2, 4 and 6) has a strip line resonator (21, 41 and 61). The filter has a plurality of terminals (11, 12 and 13) which are connected to each of the resonators. The terminals are ca ...

Atokawa Masayuki C O Murata Ma: Duplexer.. Murata Manufacturing Co, November 2, 1995: EP0680108-A1 (37 worldwide citation)

A duplexer usable for both transmission and reception in a mobile communication apparatus such as a car phone has both its transmission section and reception section mounted on a single substrate. The transmission section is connected between an input terminal and an antenna terminal and includes an ...