US2640930A - Antenna assembly - Google Patents

Antenna assembly Download PDF

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Publication number
US2640930A
US2640930A US138138A US13813850A US2640930A US 2640930 A US2640930 A US 2640930A US 138138 A US138138 A US 138138A US 13813850 A US13813850 A US 13813850A US 2640930 A US2640930 A US 2640930A
Authority
US
United States
Prior art keywords
resonator
antenna
dipole
rods
radiator
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 - Lifetime
Application number
US138138A
Other languages
English (en)
Inventor
Frank J Lundburg
Francis X Bucher
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
International Standard Electric Corp
Original Assignee
International Standard Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority to NL7115730.A priority Critical patent/NL158378B/xx
Application filed by International Standard Electric Corp filed Critical International Standard Electric Corp
Priority to US138138A priority patent/US2640930A/en
Priority to DEJ3487A priority patent/DE831419C/de
Priority to GB31584/50A priority patent/GB680512A/en
Priority to NL158378A priority patent/NL80176C/xx
Priority to FR1035591D priority patent/FR1035591A/fr
Priority to DEI3687A priority patent/DE901665C/de
Priority to CH293157D priority patent/CH293157A/fr
Priority to BE500563D priority patent/BE500563A/xx
Priority to FR64511D priority patent/FR64511E/fr
Priority to FR64853D priority patent/FR64853E/fr
Application granted granted Critical
Publication of US2640930A publication Critical patent/US2640930A/en
Priority to FR67351D priority patent/FR67351E/fr
Priority to US526716A priority patent/US2855599A/en
Priority to FR70739D priority patent/FR70739E/fr
Priority to FR845012A priority patent/FR78739E/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01J—MANUFACTURE OF DAIRY PRODUCTS
    • A01J7/00—Accessories for milking machines or devices
    • A01J7/02—Accessories for milking machines or devices for cleaning or sanitising milking machines or devices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
    • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
    • H01Q15/12—Refracting or diffracting devices, e.g. lens, prism functioning also as polarisation filter
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/24—Combinations of antenna units polarised in different directions for transmitting or receiving circularly and elliptically polarised waves or waves linearly polarised in any direction
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q3/00—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system
    • H01Q3/12—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems
    • H01Q3/14—Arrangements for changing or varying the orientation or the shape of the directional pattern of the waves radiated from an antenna or antenna system using mechanical relative movement between primary active elements and secondary devices of antennas or antenna systems for varying the relative position of primary active element and a refracting or diffracting device
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/38—Impedance-matching networks
    • H03H7/40—Automatic matching of load impedance to source impedance

Definitions

  • This: invention relates. to antennas and more particularly to an antenna assembly designed for providing, an omnidirectional and rotating figure-of-eight pattern.
  • This dipole is'made of' small dimensions relative to a half wave length atthe operating frequency, so that-it may be easily rotated and as sociated therewith, and is provided with a radiating structure toprovide the desired omnidi rectional" pattern and resonator structure to furnish the desired impedance characteristics.v of the system andto purify the polarization.
  • a radio assembly comprising a dipole an.- tenna of small. length relative to a half wave lengthof the operating frequency, a resonator effectively open to radiation about the periphery
  • the resonator is in: the-form of a cage-made of conductive plates which may be interconnected by vertical rods or maybe interconnected by a conductive sheet providedwitlr vertical slots around its periphery.
  • the omnidirectional radiator comprises radi'at-- ing elements arranged symmetrically about'the' dipole and cophasally' energized and may be positioned' between adjacent rods or conductiveportionsofthe cage.
  • The" resonator structure itself may producep'olarization errors of itsown and toavoid these extensions may be provided;
  • resona for structure may not completely compensate the capacitive reactance of the short dipole" so there may be” provided within the first cage a second cage structure comprising a plurality of spaced rods 01'' a cylinder with a plurality of spaced slots about said dipole mounted on a di-- ameter smaller than the first cage.
  • a conductive plate which may be” adjusted to provide an inner.
  • Fig. 1 is an illustration of the physical construction of an entire assembly incorporating the features of our invention as viewed along linesl'lof Fig. 2, with certain of the elements omitted for clarity ofillustration;
  • Fig. 21 is. a diagram more clearly illustrating the antenna construction itself with respect to its functional operation
  • Fig. 3 is a diagram illustrating the manner of. feeding the omnidirectional. antennas. of the assembly
  • Figs. 4, 5,. and 6. arediagrammatic showings illustratinghow. polarizationerrors ariseand are compensated.
  • Fig. '7. illustrates a modified physicalv construction of the, antenna assembly.
  • a folded dipole unit 1 which may be fed by some form of feeding arrangement shown at 2 and may be coupled through a rotary coupler 3 to coaxial feed line 4. Adjacent the base of the coupler 2 is provided a first conductive plate 5 and spaced there-above a second conductor plate 6.
  • plates 5 and 6 are interconnected by a plurality of rods I, which form effectively a resonator structure which may be considered as a radiator excited by dipole antenna I.
  • the spacing between plates 5 and 6 is made slightly greater than 2 at the center frequency.
  • Rods I are spaced sufficiently close to one another around the periphery to provide an effective vertical polarization screen or filter so that only the horizontally polarized energy passes.
  • Each two adjacent rods I form effectively the boundaries of a short section of wave guide which act as the ultimate radiators. As it is longer than a half wave length it will freely pass radiated energy in the TE m mode.
  • the resonator efiectively provides an impedance match with the outer atmosphere or ether.
  • antenna I Since antenna I is short with respect to a wave length it will have a low radiation resistance and high capacitive reactance and hence would be inefficient.
  • the resonator formed by plates 5 and 6 and rods I does not fully overcome these deficiencies.
  • a second or inner cage is provided by a plurality of rod-s 8, arranged on a smaller diameter and concentric with circle of rods I, extending between plates 5 and 6.
  • a movably adjustable plate 9 is provided mounted on rods 8. This plate may be adjusted to provide the desired resonance loading for the dipole I to compensate the capacitive reactance and obtain the desired radiation efiiciency. Plate 9 and rods 8 together with plate 5 form a second resonator about dipole I.
  • This wave guide will have a filtering action tending to reduce. the amount of energy radiated from the resonator but since the length of wave guide is very short as determined by diameter of rods 8 this eifect will be negligible. After adjustment of this resonator structure there may still be a slight mismatch between the entire antenna assembly and transmission line I. In this case a matching impedance may be bridged on the line and may be housed for example within the rotary coupler 3.
  • Certain of the rods 8 may be made in the form of hollow conductors as indicated at I0, II, I2 and I3. These may serve as coaxial transmission lines for feeding respective antenna units I4, I5, I6 and II, Figs.
  • arate feed lines I8, I9, 20 and 2! may be provided each of substantially equal length to supply to these antenna units energy in cophasal relation coming in over a common feed line 22.
  • the structure so far described will provide a rotatable figure-of-eight and omnidirectional pattern which will be generally horizontally polarized.
  • a certain amount of vertical polarization may be radiated from the structure due to the radiation about the upper and lower ends of the resonator cage.
  • Fig. 4 the radiation coming from the resonator formed by plates 5 and E and rods 7, will be in the general form shown by lines 23 and lines 24 of Fig. 4. It will be seen that the radiation lines of electric force which close around the portion of the resonator defined by rods I are purely horizontally polarized. However, some of the energy lines as shown at 24 will close over the ends of the resonator structure and these lines since they are in the vertical plane or have components in this plane will produce accompanying vertical polarization components. It has been found that by adding extensions to the main resonator cage as indicated at 25 of Fig. 5 this accompanying vertically polarized energy can be reduced to an inconsequential value. It is believed that this is caused as illustrated in Fig.
  • Fig. 6 illustrates the effect of the lines of electric field from the omnidirectional loop 26 shown generalized instead of by separate conductors I 4-II as in Figs. 1-3. So long as the loop elements are made so short that energy fed thereto is substantially constant throughout the length of these radiators substantially pure horizontal polarized energy will be radiated therefrom. As long as the conditions described obtain with respect to the omnidirectional radiator this radiator may be mounted anywhere about the dipole either within the resonator cages or outside thereof. Should there exist any vertically polarized components in the omnidirectional radiator it is desirable further that this radiator be mounted within the cage resonator structure so that such components may be effectively filtered out.
  • these extensions are illustrated as plates 21 and 28 interconnected with plates 5 and 6 respectively by means of rods 29 and 312.
  • the entire antenna assembly may be mounted directly on the ground or on any suitable support as indicated at 3
  • FIG. 1 gives an idea of a structure in accordance with our invention, a better understanding of the feeding of antenna units I4, I5, I 6 and Il may be had by reference to Figs. 2 and 3. In these figures it will be noted that the in-.
  • her conductors and transmissionlines I8, I9, 20 and 2I extend up through rods Iii, II, I2 and I3 and out through openings therein across to the next adjacent rods 8 of the assembly. In this manner the feeding can be accomplished relatively simple.
  • the pattern from the dipole I is indicated generally at 28a, Fig. 2, while the omfor operation in the 700 to 800 megacycle range,
  • dmoie antenna.
  • I was made. substantially a. tenth. ofi'awa e lengthi long and was designed; for. 0911- pling toia motor for rotation; at. 1800; R... R; M'.
  • the inner: cagea was. made. of a. diameter; in. the onderof one halt-wavelength. at the: center irequency and the. spacing between rods: 15, 22 2-5.
  • andiizfii wasmai-ile: the; order of one tenth wave length; Itlwill:be.recognizedi.thatronly'thedipole unit itselfi needibe. rotated, the; remaining part ofx'the. structure? being; fixed. lihis. arrangement was found. to.
  • a modification: of: the. arr-- tennawherein the outer" edge structure. comprises a cylindrical; sheet 3Zl:-,, terminated at. its. ends: by plates; 32*, 33-.
  • a plurality of slots 34 are. provided. in the, surface; of sheet 3L. These slots should. be dimensioned in accordance with. theopeningsbetween.
  • the rods as described in connection WithFig', 1 Extensions 35 and 36 may: be. provided above and below the resonator cage. structure, these; extensions. being shownas. extended: cylindrical. sheet portions. No. slots, need. be provided. in these extensions as their purpose: will. be iiulfilled. as well. without them. In. fact the.- extensions shown. in 1. could aswell. be, continuous. sheets, but the rod. construe--- tion is more convenient there.
  • the; openvconstructioni providesza lighter Weight structurelessz'sub ject'tozwinckpressures.
  • An inner cage structure is shown at 3'! which mayralso: be in; the. form of a cylindrical: sheet provided with slots 38'.
  • The. adjustable wall portion may be in the form of a shorting plunger 39 which may be adjusted torender the desired portions of slots 38- effective.
  • the dipole radiator withincage 31 maybe the same as in Fig. 1, and theorem-directional antenna may be-formed by conductors bridged across certain of slots 38 and fed as in Fig. I. It Will be clear that if desired any combination of the rod construction Of Fig. 1 and the sheetconstruction of. Fig, 7 maybe-used.
  • the resonator having: dimensions suitable to provide the necessamloadingz. Since: 2; short dipole; radiator has: a larger: capacity reactanca, the resonator structune: will generally be.- predominantly; inductive; to compensate the capacitive: reactance and; re;- prise the impedance to a real impedance. Any residual mismatch can beitaken. care of by any known. type oirimpedancer-matchingv device. Also the-dipoleneed not: be of the folded type but: may: be-of any"desiredconstruction.
  • radio antenna assembly comprising; a radiating dipole antenna of. small length. relativeztoyhalf. a wavelength at theoperating frequency tnprovide a directive figure-of-eight pat-- tern, a; resonator efiectively open to radiation abmitqonea periphery; thereof effectively enclosing. said".
  • antenna, and an. omnidirectional antenna mounted symmetrically about. said dipole an-- terma.
  • said: resonator comprises, a pair of plates; having conductive.- surfaces, spaced on oppositeasides of saiddipole, and. aplurality of con- (hIBtiVGj-z rods perpendicular to; the planeof-polari'zation of said: dipole, spaced around the. dipole andlv connected. to. said: plates, and said omnidiitectionalantenna. comprises, radiating elements.
  • a radio antenna according to claim 4, fur-- ther comprising an extension at the other end, of said resonator for attenuating said perpendicular' polarized component.
  • a radio antenna assembly comprising 2. (ii-- poleradiator havingan overall length short with respect to a quarterwave length at the operating frequency, a pair of conductive plates spaced apart on opposite sides of and substantially concentric with the center of said dipole, conductive means interconnecting said plates and providing regularly spaced conductive openings extending substantially perpendicularly to said plates, said plates and conductive means forming a resonator cage substantially matching the impedance of said antenna to the radiation space at said operating frequency, a plurality of radiators at regularly spaced intervals extending between adjacent one of said conductive means, and means for cophasally exciting said radiators.
  • said conductive means comprises a plurality of spaced rods, arranged in a circular pattern and spaced apart to provide said conductive openings.
  • An antenna assembly for providing a rotatable unidirectional radiation pattern comprising a rotatable dipole antenna to provide a directive radiation pattern, a resonator comprising a pair of plates and a set of rods interconnecting said plates forming a resonator for impedance loading of said dipole, a plurality of antenna elements, symmetrically mounted about said resonator structure and said dipole to provide an omnidirectional radiation pattern, and means for supplying radio frequency energy to said dipole and said antenna element.
  • An antenna assembly comprising a first cage structure including four plates mounted in parallel planes and spaced apart along a given axis, and a plurality of rods regularly spaced apart at spacings small with respect to a half wave length and arranged on a circle of a given diameter concentric with said axis, said rods extending between adjacent ones of said plates and being fastened thereto; a second cage structure within said first cage structure mounted between the center two of said four plates, said second cage structure comprising a plurality of rods mounted between said plates on a periphery of diameter less than said diameter, and a movable plate mounted on said rods for adjustable positioning therealong, a dipole radiator rotatably mounted on one of said two plates within said second cage structure, energizing means for supplying radio frequency energy to said dipole radiiator, four radiator elements mounted between adjacent rods of said second cage structure and regularly spaced from one another, one end of each radiator being connected to respective of said rods, the rods adjacent similar ends of said radiators being made hollow,
  • a radio antenna assembly for radiating horizontally polarised waves comprising a substantially cylindrical radiant energy emitting resonator for radiating energy substantially horizontally polarised and an extension at one end of said resonator for attenuating any vertically polarised component radiation energy from said resonator, said extension having substantially the same cross-sectional dimensions as said resonator and being electrically connected thereto.
  • a radio antenna according to claim 12, fur-v ther comprising an extension at the other end of said resonator of substantially the same crosssectional configuration for further attenuating said perpendicularly polarised components.
  • a radio antenna assembly comprising a directive radiator of small dimensions relative to a half Wavelength for radiating a figure-of-eight pattern of plane polarized energy, a resonator effectively open to radiation about one periphery thereof effectively enclosing said directive radiator and forming effectively a polarization filter about said open periphery, an extension at one end of said resonator for attenuating any component radiation energy polarized perpendicularly to the plane of polarization of said radiator, and an inner resonator open to radiation about its periphery and adjustable to compensate the inherent capacitive reactance of said radiator.
  • a radio antenna assembly comprising a directive radiator of small dimensions relative to a half wavelength for radiating a figure-of-eight pattern of plane polarized energy, a resonator efiectively open to radiation about one periphery thereof effectively enclosing said directive radiator and forming efiectively a polarization filter about said open periphery, an extension at one end of said resonator for attenuating any component radiation energy polarized perpendicularly to the plane of polarization of said directive radiator, and an omnidirectional radiator for radiat ing energy plane polarized in the same plane as said directive radiator, said omnidirectional radiator comprising short radiating elements mounted symmetrically about said directive radiator.

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  • Life Sciences & Earth Sciences (AREA)
  • Animal Husbandry (AREA)
  • Environmental Sciences (AREA)
  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Waveguide Aerials (AREA)
  • Aerials With Secondary Devices (AREA)
  • Transmitters (AREA)
  • Details Of Aerials (AREA)
US138138A 1950-01-12 1950-01-12 Antenna assembly Expired - Lifetime US2640930A (en)

Priority Applications (15)

Application Number Priority Date Filing Date Title
NL7115730.A NL158378B (nl) 1950-01-12 Stofzuiger.
US138138A US2640930A (en) 1950-01-12 1950-01-12 Antenna assembly
DEJ3487A DE831419C (de) 1950-01-12 1950-11-09 Antenne geringer Dimension
GB31584/50A GB680512A (en) 1950-01-12 1950-12-29 Antenna assembly
NL158378A NL80176C (da) 1950-01-12 1951-01-05
FR1035591D FR1035591A (fr) 1950-01-12 1951-01-11 Anteunes
CH293157D CH293157A (fr) 1950-01-12 1951-01-12 Dispositif d'antenne radioélectrique.
DEI3687A DE901665C (de) 1950-01-12 1951-01-12 Antennenanordnung
BE500563D BE500563A (da) 1950-01-12 1952-03-28
FR64511D FR64511E (fr) 1950-01-12 1952-04-30 Antennes
FR64853D FR64853E (fr) 1950-01-12 1952-05-30 Antennes
FR67351D FR67351E (fr) 1950-01-12 1954-09-02 Antennes
US526716A US2855599A (en) 1950-01-12 1955-08-05 Antenna tuning unit
FR70739D FR70739E (fr) 1950-01-12 1956-08-03 Antennes
FR845012A FR78739E (fr) 1950-01-12 1960-11-25 Collecteur universel pour installations de traite

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US138138A US2640930A (en) 1950-01-12 1950-01-12 Antenna assembly

Publications (1)

Publication Number Publication Date
US2640930A true US2640930A (en) 1953-06-02

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US138138A Expired - Lifetime US2640930A (en) 1950-01-12 1950-01-12 Antenna assembly
US526716A Expired - Lifetime US2855599A (en) 1950-01-12 1955-08-05 Antenna tuning unit

Family Applications After (1)

Application Number Title Priority Date Filing Date
US526716A Expired - Lifetime US2855599A (en) 1950-01-12 1955-08-05 Antenna tuning unit

Country Status (7)

Country Link
US (2) US2640930A (da)
BE (1) BE500563A (da)
CH (1) CH293157A (da)
DE (2) DE831419C (da)
FR (6) FR1035591A (da)
GB (1) GB680512A (da)
NL (2) NL80176C (da)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770800A (en) * 1951-06-02 1956-11-13 Itt Antennas
US2834013A (en) * 1953-09-02 1958-05-06 Itt Plural antenna assembly
US2938208A (en) * 1955-01-05 1960-05-24 Itt Omnirange beacon antenna having rotating parasitic conductive elements
US2985876A (en) * 1957-01-23 1961-05-23 Marconi Wireless Telegraph Co Aerial systems
US3262119A (en) * 1965-07-30 1966-07-19 Bendix Corp Cavity backed slot antenna with rotatable loop feed
EP3182512A1 (fr) * 2015-12-18 2017-06-21 Thales Antenne multi-acces
US20200280350A1 (en) * 2018-02-26 2020-09-03 Parallel Wireless, Inc. Miniature Antenna Array With Polar Combining Architecture

Families Citing this family (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2836823A (en) * 1952-12-19 1958-05-27 Paul A Kennebeck Wave guide transmitting antenna
CH326809A (de) * 1954-11-11 1957-12-31 Patelhold Patentverwertung Richtantennensystem mit Umlenkspiegeln
DE958747C (de) * 1955-03-24 1957-02-21 Int Standard Electric Corp Antennenanordnung fuer ein Drehfunkfeuer
DE1019355B (de) * 1955-07-25 1957-11-14 Int Standard Electric Corp Breitband-Richtantennensystem
DE1059055B (de) * 1956-08-21 1959-06-11 Collins Radio Co Senderantenne fuer Drehfunkfeuer
US2993204A (en) * 1958-02-28 1961-07-18 Itt Two-band helical antenna
US3003126A (en) * 1958-12-08 1961-10-03 Jasik Henry Impedance transformer
US3262075A (en) * 1961-11-07 1966-07-19 Anzac Electronics Inc Impedance matching transformer
US3281721A (en) * 1962-05-11 1966-10-25 Sperry Rand Corp Impedance matching system
US3179941A (en) * 1962-08-17 1965-04-20 Dynascan Corp Helical antenna with adjustable length by switching
US3381222A (en) * 1964-06-12 1968-04-30 John L. Gray Radio telephone with automatically tuned loaded antenna
US3412403A (en) * 1964-12-22 1968-11-19 Carl I. Peters Jr. Radiating tuned inductance coil antenna
US3601717A (en) * 1969-11-20 1971-08-24 Gen Dynamics Corp System for automatically matching a radio frequency power output circuit to a load
US4064474A (en) * 1976-11-09 1977-12-20 Solitron Devices, Inc. Impedance ratio varying device
EP0106082B1 (de) * 1982-09-10 1986-12-17 Bayer Ag Neue Polyphosphate, deren Herstellung und Verwendung
US4803493A (en) * 1986-12-01 1989-02-07 Jamison Wayne L Mobile antenna circuit with variable line length
US6653803B1 (en) * 2000-05-30 2003-11-25 Axcelis Technologies, Inc. Integrated resonator and amplifier system
US7176840B1 (en) 2005-04-08 2007-02-13 Michael Peter Kelley Variable spacing inductance coil apparatus and method
US20070248116A1 (en) 2006-04-21 2007-10-25 Masashi Hamada Communication control apparatus and method of controlling same
CN106785368B (zh) * 2016-12-26 2019-08-02 广东中元创新科技有限公司 一种多瓣高增益uv全向带am天线

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1860123A (en) * 1925-12-29 1932-05-24 Rca Corp Variable directional electric wave generating device
US1912754A (en) * 1929-06-11 1933-06-06 Telefunken Gmbh Antenna
GB553970A (en) * 1941-12-09 1943-06-11 Standard Telephones Cables Ltd Improvements in or relating to antenna systems
US2465416A (en) * 1943-10-02 1949-03-29 Zenith Radio Corp Resonant circuit and radiator
US2532919A (en) * 1947-04-21 1950-12-05 Johnson William Arthur Radio aerial system, and particularly directive aerial system
US2532920A (en) * 1947-04-21 1950-12-05 Johnson William Arthur Radio aerial system, and particularly directive aerial system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2498078A (en) * 1945-03-30 1950-02-21 Bell Telephone Labor Inc Common control for electrical tuners and couplers
US2515436A (en) * 1945-10-04 1950-07-18 Radio Ind Tuning device for true antennas
US2657362A (en) * 1951-05-15 1953-10-27 Aeronautical Comm Equipment In Impedance matching network
US2745067A (en) * 1951-06-28 1956-05-08 True Virgil Automatic impedance matching apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1860123A (en) * 1925-12-29 1932-05-24 Rca Corp Variable directional electric wave generating device
US1912754A (en) * 1929-06-11 1933-06-06 Telefunken Gmbh Antenna
GB553970A (en) * 1941-12-09 1943-06-11 Standard Telephones Cables Ltd Improvements in or relating to antenna systems
US2465416A (en) * 1943-10-02 1949-03-29 Zenith Radio Corp Resonant circuit and radiator
US2532919A (en) * 1947-04-21 1950-12-05 Johnson William Arthur Radio aerial system, and particularly directive aerial system
US2532920A (en) * 1947-04-21 1950-12-05 Johnson William Arthur Radio aerial system, and particularly directive aerial system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2770800A (en) * 1951-06-02 1956-11-13 Itt Antennas
US2834013A (en) * 1953-09-02 1958-05-06 Itt Plural antenna assembly
US2938208A (en) * 1955-01-05 1960-05-24 Itt Omnirange beacon antenna having rotating parasitic conductive elements
US2985876A (en) * 1957-01-23 1961-05-23 Marconi Wireless Telegraph Co Aerial systems
US3262119A (en) * 1965-07-30 1966-07-19 Bendix Corp Cavity backed slot antenna with rotatable loop feed
EP3182512A1 (fr) * 2015-12-18 2017-06-21 Thales Antenne multi-acces
FR3045838A1 (fr) * 2015-12-18 2017-06-23 Thales Sa Antenne multi-acces
US20200280350A1 (en) * 2018-02-26 2020-09-03 Parallel Wireless, Inc. Miniature Antenna Array With Polar Combining Architecture
US11923924B2 (en) * 2018-02-26 2024-03-05 Parallel Wireless, Inc. Miniature antenna array with polar combining architecture

Also Published As

Publication number Publication date
BE500563A (da) 1952-11-12
US2855599A (en) 1958-10-07
FR1035591A (fr) 1953-08-26
NL80176C (da) 1955-08-15
FR70739E (fr) 1959-07-10
FR64511E (fr) 1955-11-14
NL158378B (nl)
GB680512A (en) 1952-10-08
DE831419C (de) 1952-02-14
CH293157A (fr) 1953-09-15
FR78739E (fr) 1962-08-31
DE901665C (de) 1954-01-14
FR64853E (fr) 1955-12-14
FR67351E (fr) 1958-03-06

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