US2156653A - Ultra short wave system - Google Patents

Ultra short wave system Download PDF

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Publication number
US2156653A
US2156653A US81225A US8122536A US2156653A US 2156653 A US2156653 A US 2156653A US 81225 A US81225 A US 81225A US 8122536 A US8122536 A US 8122536A US 2156653 A US2156653 A US 2156653A
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Prior art keywords
beam
reflector
short wave
antenna
ultra short
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Expired - Lifetime
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US81225A
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Ilberg Waldemar
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Telefunken AG
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Telefunken AG
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    • HELECTRICITY
    • H01BASIC ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q25/00Antennas or antenna systems providing at least two radiating patterns
    • H01Q25/002Antennas or antenna systems providing at least two radiating patterns providing at least two patterns of different beamwidth; Variable beamwidth antennas

Description

May 2, 1939.

w. ILBERG ULTRA SHORT WAVE SYSTEM Filed May 22, 1936 lay;-

REFLECTOR INVENTOR WALDEMAR ILBERG ATTORNEY Patented May 2, 1939 UNITED STATES PATENT OFFICE ULTRA SHORT WAVE SYSTEM tion of Germany Application May 22,

1936, Serial No. 81,225

In Germany June 4, 1935 3 Claims.

The present invention relates to direction or bearing finding systems wherein communication is eiiected by means of beams having varying degrees of beam concentration.

In communication with electric wave beams, particularly where decimeter waves are employed, it may often be of advantage to operate during the running of a station consecutively with different beam concentrations. An example of this type of operation is the so-called search reception wherein a directional receiver expects a transmission coming from a transmitter of unknown position. In this case it is best to scan the territory with a receiver having wide beam angles until signals (even if only very weak ones at first) are heard. After the direction has thus been somewhat established, it is best then to go over to a concentrated beam fora distinct and distortionless reception of the transmitter signals. A similar case exists when a field is to be probed by means of a transmitter-receiver apparatus in order to find out whether back radiating or reflecting objects are located in the territory or area. In this case also, use is made first I of a broad beam and the direction of the back radiating object is then exactly determined with a concentrated beam.

For achieving this result, there have been proposed antenna arrangements wherein the beam concentration is varied by variation of the feeding of the individual transmitters.

In accordance with the present invention, use is made of a directional antenna whose beam angle is adjusted to vary the effectiveness of its individual radiators and/or its distance from a suitable reflector.

Figs. 1 and 2 show two practical embodiments of the invention, and Fig. 3 is a curve illustrating different radiation diagrams obtainable by a system such as Fig. 2.

Fig. 1 shows a Christmas tree antenna with the dipole pairs I, l'-8, 8'. Two switches Sam and SChz are provided for enabling the disconnection of the dipole pairs 3, 3 to 8, 8'. Hence the Christmas tree antenna can Work with two or eight dipole pairs, 1. e., two different degrees of beam concentration are obtainable. Of course, more switches can be provided so that the antenna can be operatively connected with from one to eight dipole pairs and thus eight difierent beam concentrations are assured. The transmitter or receiver is connected to the antenna at the end of a transmission line as indicated at S.

By this disconnecting of parts of the multiple antenna its total wave resistance changes, of

course; this might be, if necessary, compensated by disposing auxiliary impedances of suitable value in the feeder line.

A further embodiment of an antenna with various beam concentration would also be one wherein the relative position of a radiator with respect to a reflector is more or less varied.

Fig. 2 illustrates a further example of an antenna arrangement according to the invention. Here, the concentration of the beam is accomplished in one of the coordinates by a suitable reflector, in the other by means of a row of single dipoles. For obtaining lesser concentration in vertical directions, variation is accomplished by disconnecting dipoles, by means of switch Sch, for example, the concentration of the beam in horizontal direction is then lessened by a shifting of the dipole, or the dipole row out of the focal line of the reflector.

In Fig. 2, Sp is a cylindrical parabolic mirror or reflector. D1, D2 and D3 represent a row of dipoles disposed in the focal line. The arrangement as drawn has a definite beam concentration. If the same is to be lessened, dipole D2 is, for instance, used only and moved out of the focal line to position D2. The degrees of beam concentration accomplished by this movement are shown in Fig. 3. Beam B can be emitted or received with the angle 51, and beam B2 with the angle 52.

The embodiments herein cited do not, of course, cover by far the entire field of the invention. Thus, the cited examples can be modified, for example, by adjustment of any desired beam concentration between a circular diagram and the sharpest concentration possible.

What is claimed is:

1. In an antenna system, the combination with a reflector and a plurality of aerials located substantially at the focus of said reflector in a plane coincident with the axis of said reflector, and signaling means connected to said aerials, of means for disconnecting one or more of said aerials without interrupting the continuous reception of or transmission from the other aerials of said system, and means for moving the position of one or more of the remaining aerials in said plane.

2. A beam antenna system having, in combination, a plurality of dipole antennas located end to end substantially in the same straight line and in the focus of a reflector, high frequencytranslating apparatus coupled to said dipole antennas simultaneously, and means for disconnecting at least one of said dipole antennas from said apparatus without interrupting the continuous reception of or transmission from said system.

3. In an antenna system, a reflector, a plurality of aerials located substantially at the focus of 5 said reflector in a plane coincident with the axis of said reflector, translating apparatus coupled to said aerials through feed lines, and switching means serially arranged in one or more of said feed lines for disconnecting only certain of said aerials without interrupting the continued operation of the other aerials.

WALDEMAR ILBERG.

US81225A 1935-06-04 1936-05-22 Ultra short wave system Expired - Lifetime US2156653A (en)

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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2454805A (en) * 1945-05-07 1948-11-30 Standard Telephones Cables Ltd Vertical scanning antennareflector system
US2474854A (en) * 1944-07-20 1949-07-05 John W Marchetti Antenna
US2478242A (en) * 1944-11-04 1949-08-09 Roger E Clapp Antenna
US2526675A (en) * 1945-04-28 1950-10-24 Sperry Corp Antenna structure
US2570599A (en) * 1946-03-19 1951-10-09 Rca Corp Aerial array and feeder arrangement for use therewith
US2586827A (en) * 1945-03-31 1952-02-26 Sperry Corp Directive radiating system
US2589433A (en) * 1945-09-17 1952-03-18 Us Navy Wave guide feed for cylindrical paraboloid
US2594328A (en) * 1945-06-27 1952-04-29 Us Sec War Antenna switching system
US2647212A (en) * 1946-01-17 1953-07-28 Bell Telephone Labor Inc Antenna system
US2653238A (en) * 1945-10-26 1953-09-22 Kenneth T Bainbridge Dual frequency antenna
US2659006A (en) * 1945-10-10 1953-11-10 Raymond G Herb Radar system and antenna therefor
US2664508A (en) * 1945-07-09 1953-12-29 Sichak William Antenna
US2690508A (en) * 1947-01-10 1954-09-28 Bell Telephone Labor Inc Directive antenna system
US2706780A (en) * 1952-07-31 1955-04-19 Rca Corp Antenna array
US2709252A (en) * 1948-08-20 1955-05-24 Gilfillan Bros Inc Multi-plane tracking in ground controlled approach system
US2755467A (en) * 1946-05-15 1956-07-17 Leonard J Eyges Broadband linear array
US2934763A (en) * 1949-02-28 1960-04-26 Hopkins Cleveland Rapid scanning antenna directive system
US3014212A (en) * 1956-05-25 1961-12-19 Cossor Ltd A C Secondary radar systems
US3159839A (en) * 1955-07-07 1964-12-01 Donald L Hings Driven dipole coupled to a colinear array spaced with respect to the first fresnel zone
US3295136A (en) * 1963-07-09 1966-12-27 Bell Telephone Labor Inc Antenna system wherein beamwidth variation is achieved by changing aperture area of primary antenna
US3483563A (en) * 1965-10-13 1969-12-09 Collins Radio Co Combination vertically-horizontally polarized paracylinder antennas

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474854A (en) * 1944-07-20 1949-07-05 John W Marchetti Antenna
US2478242A (en) * 1944-11-04 1949-08-09 Roger E Clapp Antenna
US2586827A (en) * 1945-03-31 1952-02-26 Sperry Corp Directive radiating system
US2526675A (en) * 1945-04-28 1950-10-24 Sperry Corp Antenna structure
US2454805A (en) * 1945-05-07 1948-11-30 Standard Telephones Cables Ltd Vertical scanning antennareflector system
US2594328A (en) * 1945-06-27 1952-04-29 Us Sec War Antenna switching system
US2664508A (en) * 1945-07-09 1953-12-29 Sichak William Antenna
US2589433A (en) * 1945-09-17 1952-03-18 Us Navy Wave guide feed for cylindrical paraboloid
US2659006A (en) * 1945-10-10 1953-11-10 Raymond G Herb Radar system and antenna therefor
US2653238A (en) * 1945-10-26 1953-09-22 Kenneth T Bainbridge Dual frequency antenna
US2647212A (en) * 1946-01-17 1953-07-28 Bell Telephone Labor Inc Antenna system
US2570599A (en) * 1946-03-19 1951-10-09 Rca Corp Aerial array and feeder arrangement for use therewith
US2755467A (en) * 1946-05-15 1956-07-17 Leonard J Eyges Broadband linear array
US2690508A (en) * 1947-01-10 1954-09-28 Bell Telephone Labor Inc Directive antenna system
US2709252A (en) * 1948-08-20 1955-05-24 Gilfillan Bros Inc Multi-plane tracking in ground controlled approach system
US2934763A (en) * 1949-02-28 1960-04-26 Hopkins Cleveland Rapid scanning antenna directive system
US2706780A (en) * 1952-07-31 1955-04-19 Rca Corp Antenna array
US3159839A (en) * 1955-07-07 1964-12-01 Donald L Hings Driven dipole coupled to a colinear array spaced with respect to the first fresnel zone
US3014212A (en) * 1956-05-25 1961-12-19 Cossor Ltd A C Secondary radar systems
US3295136A (en) * 1963-07-09 1966-12-27 Bell Telephone Labor Inc Antenna system wherein beamwidth variation is achieved by changing aperture area of primary antenna
US3483563A (en) * 1965-10-13 1969-12-09 Collins Radio Co Combination vertically-horizontally polarized paracylinder antennas

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