GB761762A - Microwave transmission systems and impedance matching devices therefor - Google Patents
Microwave transmission systems and impedance matching devices thereforInfo
- Publication number
- GB761762A GB761762A GB12111/53A GB1211153A GB761762A GB 761762 A GB761762 A GB 761762A GB 12111/53 A GB12111/53 A GB 12111/53A GB 1211153 A GB1211153 A GB 1211153A GB 761762 A GB761762 A GB 761762A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductor
- junction
- susceptance
- line
- discontinuity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000005540 biological transmission Effects 0.000 title abstract 4
- 239000004020 conductor Substances 0.000 abstract 13
- 229910000679 solder Inorganic materials 0.000 abstract 2
- 230000004048 modification Effects 0.000 abstract 1
- 238000012986 modification Methods 0.000 abstract 1
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03L—AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES
- H03L7/00—Automatic control of frequency or phase; Synchronisation
- H03L7/02—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element
- H03L7/04—Automatic control of frequency or phase; Synchronisation using a frequency discriminator comprising a passive frequency-determining element wherein the frequency-determining element comprises distributed inductance and capacitance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B07—SEPARATING SOLIDS FROM SOLIDS; SORTING
- B07C—POSTAL SORTING; SORTING INDIVIDUAL ARTICLES, OR BULK MATERIAL FIT TO BE SORTED PIECE-MEAL, e.g. BY PICKING
- B07C3/00—Sorting according to destination
- B07C3/003—Destination control; Electro-mechanical or electro- magnetic delay memories
- B07C3/006—Electric or electronic control circuits, e.g. delay lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/18—Phase-shifters
- H01P1/184—Strip line phase-shifters
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
- H01P1/20363—Linear resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/201—Filters for transverse electromagnetic waves
- H01P1/203—Strip line filters
- H01P1/20327—Electromagnetic interstage coupling
- H01P1/20354—Non-comb or non-interdigital filters
- H01P1/20381—Special shape resonators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P1/00—Auxiliary devices
- H01P1/20—Frequency-selective devices, e.g. filters
- H01P1/207—Hollow waveguide filters
- H01P1/209—Hollow waveguide filters comprising one or more branching arms or cavities wholly outside the main waveguide
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P3/00—Waveguides; Transmission lines of the waveguide type
- H01P3/02—Waveguides; Transmission lines of the waveguide type with two longitudinal conductors
- H01P3/08—Microstrips; Strip lines
- H01P3/085—Triplate lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/08—Coupling devices of the waveguide type for linking dissimilar lines or devices
- H01P5/10—Coupling devices of the waveguide type for linking dissimilar lines or devices for coupling balanced lines or devices with unbalanced lines or devices
- H01P5/107—Hollow-waveguide/strip-line transitions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
- H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
- H01P5/184—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being strip lines or microstrips
- H01P5/187—Broadside coupled lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/247—Supports; Mounting means by structural association with other equipment or articles with receiving set with frequency mixer, e.g. for direct satellite reception or Doppler radar
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q9/00—Electrically-short antennas having dimensions not more than twice the operating wavelength and consisting of conductive active radiating elements
- H01Q9/04—Resonant antennas
- H01Q9/06—Details
- H01Q9/065—Microstrip dipole antennas
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Control Of Motors That Do Not Use Commutators (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
- Constitution Of High-Frequency Heating (AREA)
- Measurement Of Resistance Or Impedance (AREA)
- Waveguide Connection Structure (AREA)
- Waveguides (AREA)
Abstract
761,762. Impedance matching. STANDARD TELEPHONES & CABLES, Ltd. May I, 1953 [May 8, 1952], No. 12111/53. Class 40 (8). A discontinuity in a transmission line of the " line-ground " type described in Specifications 704,050, 708,601 and 761,764 is tuned out by means of a further discontinuity separated from the first discontinuity by a resonant spacing. Fig. 1 shows a junction between a " lineground " transmission line and a coaxial cable in which the outer conductor 4 of the coaxial cable is connected to a " ground " conductor 2 and the inner conductor 5 to a comparatively narrow " line " conductor 1. The conductors 1, 2 of the transmission line are separated by a layer 3 of dielectric a small fraction of a quarterwavelength thick. According to the invention, the mismatch presented by the junction is tuned out by a piece of wire 7 spaced from the junction by a distance d smaller than half a wavelength. The wire 7 is soldered in position, adjustments being made whilst the solder is still molten. The wire 7 may extend around the edge of the dielectric layer 3 to contact the " ground " conductor 2, thus forming a short circuit. Such a shorting loop may be formed integrally with the line conductor 1, adjustment being effected by cutting away portions of the loop to increase its distance from the junction. A further form of tuning susceptance (Fig. 6, not shown) comprises a short conductive post extending through the dielectric layer between the two conductors. In the modification of Fig. 7, the susceptance is formed by a step 28 in the width of conductor 1. To adjust the susceptance, portions 31, 32, 28a of the conductor 1 are cut away or extra conductive material is added in the form of solder. The susceptance may be in the form of a pair of short lateral extensions on either side of the line conductor 1. These may be gradually curved into the edge of conductor I on the side of the lateral extensions remote from the junction. A further form of tuning element for the resonant space between the junction and the susceptance comprises a threaded post which extends by a variable amount into the dielectric layer 3. Specification 708,598 also is referred to.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US286762A US2794174A (en) | 1952-05-08 | 1952-05-08 | Microwave transmission systems and impedance matching devices therefor |
US324545A US2859417A (en) | 1952-05-08 | 1952-12-06 | Microwave filters |
US749337XA | 1953-03-26 | 1953-03-26 | |
US3159253A | 1953-11-13 | 1953-11-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB761762A true GB761762A (en) | 1956-11-21 |
Family
ID=32329982
Family Applications (7)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2013/53A Expired GB726067A (en) | 1952-05-08 | 1953-01-23 | Microwave coupling arrangements |
GB12114/53A Expired GB761765A (en) | 1952-05-08 | 1953-05-01 | Microwave transmission line |
GB12110/53A Expired GB761761A (en) | 1952-05-08 | 1953-05-01 | Microwave filters |
GB12111/53A Expired GB761762A (en) | 1952-05-08 | 1953-05-01 | Microwave transmission systems and impedance matching devices therefor |
GB31595/53A Expired GB761778A (en) | 1952-05-08 | 1953-11-13 | Microwave filters |
GB8111/54A Expired GB749337A (en) | 1952-05-08 | 1954-03-19 | Radio frequency circuits |
GB14706/56A Expired GB809482A (en) | 1952-05-08 | 1956-05-11 | Microwave lines and high q filters |
Family Applications Before (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2013/53A Expired GB726067A (en) | 1952-05-08 | 1953-01-23 | Microwave coupling arrangements |
GB12114/53A Expired GB761765A (en) | 1952-05-08 | 1953-05-01 | Microwave transmission line |
GB12110/53A Expired GB761761A (en) | 1952-05-08 | 1953-05-01 | Microwave filters |
Family Applications After (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB31595/53A Expired GB761778A (en) | 1952-05-08 | 1953-11-13 | Microwave filters |
GB8111/54A Expired GB749337A (en) | 1952-05-08 | 1954-03-19 | Radio frequency circuits |
GB14706/56A Expired GB809482A (en) | 1952-05-08 | 1956-05-11 | Microwave lines and high q filters |
Country Status (6)
Country | Link |
---|---|
US (2) | US2859417A (en) |
BE (4) | BE519797A (en) |
CH (4) | CH317717A (en) |
DE (3) | DE1042048B (en) |
FR (13) | FR1072220A (en) |
GB (7) | GB726067A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2189652A (en) * | 1986-03-26 | 1987-10-28 | Plessey Co Plc | Adaptor for connecting a coaxial transmission line to a parallel plate transmission medium |
US7873329B2 (en) | 2006-04-25 | 2011-01-18 | ThruVision Systems Limited | Transceiver having mixer/filter within receiving/transmitting cavity |
US8134515B2 (en) | 2006-04-25 | 2012-03-13 | ThruVision Systems Limited | Feedhorn assembly and method of fabrication thereof |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3011009A (en) * | 1956-06-28 | 1961-11-28 | William J Titus | Structural components for aircraft or the like |
US2962716A (en) * | 1957-06-21 | 1960-11-29 | Itt | Antenna array |
US2954468A (en) * | 1958-03-25 | 1960-09-27 | Thompson Ramo Wooldridge Inc | Microwave filter and detector |
US2977484A (en) * | 1958-09-10 | 1961-03-28 | Rca Corp | Logic circuit for a radio frequency carrier information handling system |
US2976498A (en) * | 1959-08-03 | 1961-03-21 | Electronic Specialty Co | Radio frequency filter |
US3104362A (en) * | 1959-08-27 | 1963-09-17 | Thompson Ramo Wooldridge Inc | Microwave filter |
US3111634A (en) * | 1960-05-13 | 1963-11-19 | Singer Inc H R B | Strip transmission line modulator |
US3156880A (en) * | 1960-08-04 | 1964-11-10 | Melpar Inc | Lumped constant filter |
NL269350A (en) * | 1960-09-20 | |||
US3136946A (en) * | 1960-09-29 | 1964-06-09 | Itt | Microwave resistance measuring system including thermoplastic microstrip coupler |
US3166723A (en) * | 1961-03-06 | 1965-01-19 | Micro Radionics Inc | Variable directional coupler having a movable articulated conductor |
US3164791A (en) * | 1961-05-05 | 1965-01-05 | Melpar Inc | Strip line hybrid ring |
DE1244257B (en) * | 1961-05-25 | 1967-07-13 | Emi Ltd | Circuit arrangement for the reaction-free coupling of two voltages to form a total voltage with three strip conductors opposite a grounded common conductor |
US3153209A (en) * | 1962-06-18 | 1964-10-13 | Julius A Kaiser | Microwave filter utilizing two resonant rings and having terminals permitting use to band pass or band reject |
US3345589A (en) * | 1962-12-14 | 1967-10-03 | Bell Telephone Labor Inc | Transmission line type microwave filter |
US3235820A (en) * | 1963-08-12 | 1966-02-15 | Hughes Aircraft Co | Electrically variable phase shifter |
US3228030A (en) * | 1965-06-11 | 1966-01-04 | Gen Dynamics Corp | Shielded antenna |
JPS5130421B1 (en) * | 1965-09-30 | 1976-09-01 | ||
DE1297719B (en) * | 1967-01-12 | 1969-06-19 | Stassfurt Fernsehgeraete | Tunable line circuits for high-frequency electrical oscillations in stripline technology |
US3548344A (en) * | 1967-07-28 | 1970-12-15 | Varian Associates | Stripline gain equalizer |
US3605045A (en) * | 1969-01-15 | 1971-09-14 | Us Navy | Wide-band strip line frequency-selective circuit |
US3688225A (en) * | 1969-05-21 | 1972-08-29 | Us Army | Slot-line |
US3623112A (en) * | 1969-12-19 | 1971-11-23 | Bendix Corp | Combined dipole and waveguide radiator for phased antenna array |
US3668569A (en) * | 1970-05-27 | 1972-06-06 | Hazeltine Corp | Distributed-constant dispersive network |
US3921177A (en) * | 1973-04-17 | 1975-11-18 | Ball Brothers Res Corp | Microstrip antenna structures and arrays |
US3909755A (en) * | 1974-07-18 | 1975-09-30 | Us Army | Low pass microwave filter |
JPS5336284B2 (en) * | 1974-09-06 | 1978-10-02 | ||
US4035807A (en) * | 1974-12-23 | 1977-07-12 | Hughes Aircraft Company | Integrated microwave phase shifter and radiator module |
DE2742779C1 (en) * | 1977-09-23 | 1999-07-08 | Raytheon Co | Strip conductor mixer circuit |
FR2460049A1 (en) * | 1979-06-25 | 1981-01-16 | Labo Electronique Physique | BANDWHEEL FILTER FOR A HYPERFREQUENCY TRANSMISSION LINE AND A MICROWAVE TRANSISTOR POLARIZATION CIRCUIT COMPRISING THE FILTER |
FR2487588A1 (en) | 1980-07-23 | 1982-01-29 | France Etat | DOUBLE REPLIES IN PLATES FOR VERY HIGH FREQUENCY AND NETWORKS OF SUCH DOUBLETS |
US4316160A (en) * | 1980-07-28 | 1982-02-16 | Motorola Inc. | Impedance transforming hybrid ring |
FR2494942B1 (en) * | 1980-11-21 | 1985-07-12 | Radiotechnique Compelec | TELEVISION RECEIVING HEAD |
EP0068345A1 (en) * | 1981-06-25 | 1983-01-05 | Communications Satellite Corporation | Symmetrical coupled line coplanar waveguide filter |
US4420839A (en) * | 1982-03-30 | 1983-12-13 | Bunker Ramo-Eltra Corporation | Hybrid ring having improved bandwidth characteristic |
GB2153155B (en) * | 1984-01-24 | 1987-04-15 | Secr Defence | Improvements in or relating to microwave filters |
US4610032A (en) * | 1985-01-16 | 1986-09-02 | At&T Bell Laboratories | Sis mixer having thin film wrap around edge contact |
US4937585A (en) * | 1987-09-09 | 1990-06-26 | Phasar Corporation | Microwave circuit module, such as an antenna, and method of making same |
US5093640A (en) * | 1989-09-29 | 1992-03-03 | Hewlett-Packard Company | Microstrip structure having contact pad compensation |
FR2670327A1 (en) * | 1990-12-06 | 1992-06-12 | Europ Agence Spatiale | HYPERFREQUENCY HYBRID COUPLER WITH 3XN INPUTS AND 3XM OUTPUTS, IN PARTICULAR COUPLER 3X3. |
US5334961A (en) * | 1991-08-12 | 1994-08-02 | Matsushita Electric Industrial Co., Ltd. | Strip-line type bandpass filter |
FI90478C (en) * | 1992-03-09 | 1994-02-10 | Lk Products Oy | Filter |
US5432489A (en) * | 1992-03-09 | 1995-07-11 | Lk-Products Oy | Filter with strip lines |
US5499001A (en) * | 1994-02-24 | 1996-03-12 | Degun; Joginder S. | Cavity matched hybrid coupler |
DE19636890C1 (en) | 1996-09-11 | 1998-02-12 | Bosch Gmbh Robert | Transition from a waveguide to a strip line |
JP2001136003A (en) * | 1999-11-05 | 2001-05-18 | Murata Mfg Co Ltd | Dielectric filter, dielectric duplexer and communication unit |
FR2857165A1 (en) * | 2003-07-02 | 2005-01-07 | Thomson Licensing Sa | BI-BAND ANTENNA WITH DOUBLE ACCESS |
EP1989753A1 (en) * | 2006-03-01 | 2008-11-12 | Lucent Technologies Inc. | Meta-material filter for use in a base station of a wireless communications system |
US7616058B1 (en) | 2006-08-28 | 2009-11-10 | Raif Awaida | Radio frequency power combining |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2274346A (en) * | 1938-01-27 | 1942-02-24 | Telefunken Gmbh | Frequency selective transmission line |
BE434940A (en) * | 1938-06-22 | |||
DE866061C (en) * | 1940-09-03 | 1953-02-05 | Blaupunkt Elektronik G M B H | Device for adjusting the phase position of an electromagnetic oscillation in a waveguide |
GB578911A (en) * | 1941-08-26 | 1946-07-17 | Gen Electric Co Ltd | Improvements in electrical apparatus adapted to operate at very high frequencies |
GB579414A (en) * | 1941-10-15 | 1946-08-02 | Standard Telephones Cables Ltd | Improvements in or relating to electric wave filters |
FR899350A (en) * | 1942-11-06 | 1945-05-28 | Telefunken Gmbh | Improvements to tubular lines for very short waves |
BE473921A (en) * | 1942-12-31 | |||
GB579782A (en) * | 1943-01-08 | 1946-08-15 | Standard Telephones Cables Ltd | Phase changers |
DE871324C (en) * | 1943-02-07 | 1953-03-23 | Julius Pintsch K G | Arrangement to compensate for changes in impedance occurring at points of interference along ultra-high frequency transmission lines |
FR964835A (en) * | 1943-06-23 | 1950-08-25 | ||
US2543425A (en) * | 1945-06-14 | 1951-02-27 | Malcom W P Strandberg | Squeezable wave guide for line stretching |
FR950844A (en) * | 1945-06-19 | 1949-10-07 | Hazeltine Corp | Impedance matching device |
GB608494A (en) * | 1945-07-10 | 1948-09-16 | William Arthur Johnson | Improvements in and relating to the waveguide transmission of electromagnetic waves |
US2479673A (en) * | 1945-08-20 | 1949-08-23 | Rca Corp | Directional microwave transmission system having dielectric lens |
US2637813A (en) * | 1945-08-20 | 1953-05-05 | Rca Corp | Balanced microwave detector |
US2587590A (en) * | 1946-07-26 | 1952-03-04 | Sperry Corp | Ultrahigh-frequency apparatus |
NL145265B (en) * | 1948-04-26 | Cassella Farbwerke Mainkur Ag | PROCESS FOR THE PREPARATION OF WATER-SOLUBLE FIBER REACTIVE COLORING AGENTS CONTAINING, AS A REACTIVE GROUP, A HALOGENPYRIDAZINE RESIDUE, AND PROCESS FOR DYEING OR PRINTING WITH THE COLORING AGENTS SO OBTAINED. | |
GB655803A (en) * | 1948-08-30 | 1951-08-01 | Cossor Ltd A C | Improvements in and relating to transmission lines for radio-frequency electric oscillations |
US2710917A (en) * | 1948-09-14 | 1955-06-14 | Itt | Dual band antenna system |
US2784381A (en) * | 1948-10-05 | 1957-03-05 | Bell Telephone Labor Inc | Hybrid ring coupling arrangements |
GB670405A (en) * | 1949-04-22 | 1952-04-16 | British Thomson Houston Co Ltd | Means for controlling a member of great length for use with wave guides |
US2639325A (en) * | 1950-03-24 | 1953-05-19 | Bell Telephone Labor Inc | Hybrid ring |
DE821035C (en) * | 1950-09-10 | 1951-11-15 | Gutehoffnungshuette Oberhausen | Lock pocket for pit stamp |
BE517377A (en) * | 1951-05-23 | |||
US2721312A (en) * | 1951-06-30 | 1955-10-18 | Itt | Microwave cable |
NL176506B (en) * | 1952-03-05 | Fujitsu Ltd | GAS DISCHARGE DISPLAY DEVICE. | |
US2789210A (en) * | 1952-12-30 | 1957-04-16 | Sylvania Electric Prod | Mixing circuit for microwave frequencies |
-
0
- BE BE527584D patent/BE527584A/xx unknown
- BE BE518176D patent/BE518176A/xx unknown
- BE BE533239D patent/BE533239A/xx unknown
- BE BE519797D patent/BE519797A/xx unknown
-
1952
- 1952-12-06 US US324545A patent/US2859417A/en not_active Expired - Lifetime
-
1953
- 1953-01-23 GB GB2013/53A patent/GB726067A/en not_active Expired
- 1953-03-05 FR FR1072220D patent/FR1072220A/en not_active Expired
- 1953-05-01 GB GB12114/53A patent/GB761765A/en not_active Expired
- 1953-05-01 GB GB12110/53A patent/GB761761A/en not_active Expired
- 1953-05-01 GB GB12111/53A patent/GB761762A/en not_active Expired
- 1953-05-04 FR FR65726D patent/FR65726E/fr not_active Expired
- 1953-05-04 FR FR65725D patent/FR65725E/en not_active Expired
- 1953-05-06 FR FR65729D patent/FR65729E/fr not_active Expired
- 1953-05-06 CH CH317717D patent/CH317717A/en unknown
- 1953-05-06 CH CH316574D patent/CH316574A/en unknown
- 1953-05-06 FR FR66218D patent/FR66218E/en not_active Expired
- 1953-05-07 DE DEI7225A patent/DE1042048B/en active Pending
- 1953-05-07 DE DEI7223A patent/DE1036950B/en active Pending
- 1953-11-13 GB GB31595/53A patent/GB761778A/en not_active Expired
- 1953-12-01 FR FR66221D patent/FR66221E/en not_active Expired
-
1954
- 1954-03-19 GB GB8111/54A patent/GB749337A/en not_active Expired
- 1954-03-23 DE DEI8435A patent/DE1002828B/en active Pending
- 1954-03-24 FR FR66225D patent/FR66225E/en not_active Expired
- 1954-03-25 CH CH328921D patent/CH328921A/en unknown
- 1954-03-26 FR FR66227D patent/FR66227E/en not_active Expired
- 1954-10-01 FR FR68805D patent/FR68805E/en not_active Expired
- 1954-11-04 US US466753A patent/US2874276A/en not_active Expired - Lifetime
- 1954-11-12 FR FR68853D patent/FR68853E/en not_active Expired
-
1955
- 1955-01-07 FR FR69008D patent/FR69008E/en not_active Expired
-
1956
- 1956-02-17 FR FR69959D patent/FR69959E/en not_active Expired
- 1956-05-01 CH CH347233D patent/CH347233A/en unknown
- 1956-05-11 FR FR70420D patent/FR70420E/en not_active Expired
- 1956-05-11 GB GB14706/56A patent/GB809482A/en not_active Expired
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2189652A (en) * | 1986-03-26 | 1987-10-28 | Plessey Co Plc | Adaptor for connecting a coaxial transmission line to a parallel plate transmission medium |
GB2189652B (en) * | 1986-03-26 | 1990-01-24 | Plessey Co Plc | Adaptor for connecting a coaxial transmission line to a parallel plate transmission medium |
US7873329B2 (en) | 2006-04-25 | 2011-01-18 | ThruVision Systems Limited | Transceiver having mixer/filter within receiving/transmitting cavity |
US8134515B2 (en) | 2006-04-25 | 2012-03-13 | ThruVision Systems Limited | Feedhorn assembly and method of fabrication thereof |
Also Published As
Publication number | Publication date |
---|---|
BE527584A (en) | |
FR1072220A (en) | 1954-09-09 |
GB761761A (en) | 1956-11-21 |
FR65726E (en) | 1956-03-12 |
DE1002828B (en) | 1957-02-21 |
CH316574A (en) | 1956-10-15 |
US2874276A (en) | 1959-02-17 |
GB726067A (en) | 1955-03-16 |
DE1036950B (en) | 1958-08-21 |
GB749337A (en) | 1956-05-23 |
BE518176A (en) | |
GB761778A (en) | 1956-11-21 |
BE533239A (en) | |
FR70420E (en) | 1959-05-06 |
CH347233A (en) | 1960-06-30 |
FR66221E (en) | 1956-06-05 |
FR66225E (en) | 1956-06-05 |
GB809482A (en) | 1959-02-25 |
FR69008E (en) | 1958-08-27 |
FR65725E (en) | 1956-03-12 |
FR66218E (en) | 1956-06-05 |
GB761765A (en) | 1956-11-21 |
FR66227E (en) | 1956-06-05 |
FR68805E (en) | 1958-06-10 |
FR69959E (en) | 1959-01-30 |
FR65729E (en) | 1956-03-12 |
DE1042048B (en) | 1958-10-30 |
FR68853E (en) | 1958-06-11 |
US2859417A (en) | 1958-11-04 |
CH328921A (en) | 1958-03-31 |
CH317717A (en) | 1956-11-30 |
BE519797A (en) |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB761762A (en) | Microwave transmission systems and impedance matching devices therefor | |
US6133879A (en) | Multifrequency microstrip antenna and a device including said antenna | |
US6121930A (en) | Microstrip antenna and a device including said antenna | |
US3265995A (en) | Transmission line to waveguide junction | |
US2531447A (en) | Hybrid channel-branching microwave filter | |
GB1293459A (en) | Corporate-network printed antenna system | |
GB2232821A (en) | Antenna arrangement | |
US3970969A (en) | Device for the electrical protection of a coaxial cable by two connected circuits | |
GB761763A (en) | Microwave filters | |
US3289117A (en) | Surge arrestor utilizing quarter wave stubs | |
US2408032A (en) | Coupling arrangement | |
US5119048A (en) | Pseudo tapered lines using modified ground planes | |
US2527146A (en) | Broad band coaxial line to wave guide coupler | |
US3842360A (en) | Parametric amplifier | |
US3262121A (en) | Antenna feed point crossover | |
GB761790A (en) | Microwave power splitting junctions | |
US3471812A (en) | High impedance printed conductor circuit suitable for high frequencies | |
US2794174A (en) | Microwave transmission systems and impedance matching devices therefor | |
GB1009527A (en) | Dual frequency antenna structure | |
US2563613A (en) | Translating means for ultra-short | |
US2735073A (en) | Bandpass | |
US2931992A (en) | Microwave impedance branch | |
GB767067A (en) | Microwave transmission line phase shifter | |
US3560887A (en) | Directional filter comprising a resonant loop coupled to a transmission line pair | |
GB647172A (en) | Multiple-tuned wave-selector system |