1
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 ...


2
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 ...


3
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 ...


4
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 ...


5
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 ...


6
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 ...


7
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.


8
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 ...


9
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 ...


10
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 ...