US2524830A - Beacon antenna system - Google Patents

Beacon antenna system Download PDF

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Publication number
US2524830A
US2524830A US584596A US58459645A US2524830A US 2524830 A US2524830 A US 2524830A US 584596 A US584596 A US 584596A US 58459645 A US58459645 A US 58459645A US 2524830 A US2524830 A US 2524830A
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US
United States
Prior art keywords
wires
antenna
screen
series
radiation
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
US584596A
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English (en)
Inventor
Sidney B Pickles
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.)
Federal Telephone and Radio Corp
Original Assignee
Federal Telephone and Radio 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 BE469846D priority Critical patent/BE469846A/xx
Application filed by Federal Telephone and Radio Corp filed Critical Federal Telephone and Radio Corp
Priority to US584596A priority patent/US2524830A/en
Priority to ES172871A priority patent/ES172871A1/es
Priority to FR923933D priority patent/FR923933A/fr
Priority to CH273990D priority patent/CH273990A/de
Application granted granted Critical
Publication of US2524830A publication Critical patent/US2524830A/en
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
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/10—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using reflecting surfaces
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • 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

Definitions

  • This invention relates to antenna systems and more specially to antenna systems for use in directive radio systems such as localizing, guiding, beacon systems and the like.
  • a principal object is to provide an improved antenna arrangement for controlling the field of radiation and non-radiation in a desired direction or directions.
  • the invention is in the nature of an improvement upon the antenna arrangement disclosed in my copending application, Serial No. 580,674, filed March 2, 1945.
  • a radiating beacon system wherein the directive antenna proper is provided with a special form of radiation shield and reflector whereby the directive radiated field pattern can be given one or more minimum field intensity regions which can be directed at desired angles without materially affecting the main directed beam action of the antenna.
  • a feature of the invention relates to a radiation screen for beacon antennae and the like wherein the screen is provided with a novel arrangement for terminating the ends of the screen to achieve improved directivity and field pattern control.
  • Another feature relates to a radiation screen for beacon antennae and the like comprising a series of screen conductors mounted in spaced array and with respect to the beacon antenna. These conductors have novel terminating means to render them substantially aperiodic at the beacon working frequencies.
  • a further feature relates to a radiation screen for antennae, comprising a wire network. which is provided with a series of auxiliary radiation absorption units for preventing standing waves in the main body of the screen at the antenna working frequencies, and without the necessity of employing relatively long terminating wires which approach the earth.
  • a further feature relates to a radiation screen for antennae, comprising a series of spaced superposed conductors whose ends are space-coupled to individual radiation absorbing terminal units to terminate said conductors in their characteristic impedances.
  • a further feature relates to a bi-part reflecting screen for antennae, comprising a main series of spaced reflector conductors and an auxiliary series of reflector conductors for controlling the resonance characteristics of the said main conductors at the antenna working frequencies.
  • a still further feature relates to a reflecting screen for antennae, comprising a series of spaced reflector conductors having their configuration designed to provide a terminating impedance equivalent to their characteristic impedance and without the necessity of employing extensive terminating wires for that purpose.
  • Fig. 1 is a plan view of an antenna array and reflector-shield arrangement embodying principles of the invention.
  • Fig. 2 is a front elevation view of Fig. 1.
  • Fig. 3 is an elevational view showing a modification of Figs. 1 and 2.
  • a series of horizontal loop antennae l which may be supported in any suitable manner to provide the well-known broadside antenna array whereby a directed radiation field is produced. While the drawing shows a series of five antenna units, it will be understood that a greater or less number may be employed. Further, while the antennae are shown as of the loop type, any other well-known directive antenna units may be employed.
  • a reflector-shield or screen comprising a series of spaced conductors 2, insulatingly mounted on posts 3 and 4.
  • the distance D between the screen and the antenna array is preferably made one-half wave length or greater, while the length L of the screen may be from 4 to 8 wave lengths so as to provide the required shielding action rearwardly of the antennae.
  • the wires 2 may be strung between poles 3 and 4, so as to be relatively close to each other, depending of course upon the particular screening and reflecting actions desired.
  • auxiliary screen members 5, 9, which can be insulatingly supported in any well-known manner on suitable posts 'i, 8.
  • Each of the members 5, 6, may be in the form of a single straight conductor preferably of a half wave length, and each is mounted in front of a corresponding wire 2 of the main screen.
  • the spacing and location of the wires 5 with respect to wires 2, can be varied to provide the desired phase and coupling ratio therebetween so as to achieve the desired impedance termination for the main screen wires. While the drawing shows the wires 5 displaced vertically with respect to the associated wires 2, it will be understood that, if desired, each wire 5 may be mounted in the same plane as the associated wire 2, or if desired, they may be mounted at any suitable angle with respect thereto.
  • the correct phasing to achieve the desired terminating impedance will be a function of the length L of the main screen and the coupling between the wires 2 and 5. It can be shown that the tightest coupling will be obtained when the main section wires 2 extend one-quarter wave length beyond the ends of auxiliary wires 5.
  • the auxiliary wires 5 have considerable directional properties, and when they are excited under control of the wires 2, they act as auxiliary radiators and therefore may be used to add small amounts of energy on the directed field pattern from the antenna I, thus giving additional control over the sensitivity and shape of the field pattern. It will be understood that while the drawing shows the auxiliary wires at each end of the screen equal in number to the main wires 2, one or more of these auxiliary wires may be deleted in order to produce special efiect on the field pattern.
  • FIG. 3 there is shown a modification of Figs. 1 and 2 for obtaining substantially the same results.
  • this control may be effected without such separate members or in addition thereto.
  • the wires 2 instead of proceeding directly to their ends, are provided adjacent those ends with bent or partially looped sections 9 and 10. These sections 9 and I! may be in the form of half loops.
  • the semi-loops 9 and I0 provide a quasi-discontinuity in the propagation characteristics of the wires 2 along their lengths, and the sections 9 and I0 perform substantially the same function as though the wires 2 (Fig.
  • An arrangement for controlling the radiation pattern of an antenna comprising a radiation screen made of a series of horizontal wires mounted in spaced relation to the antenna, and means to control the aperiodicity of said screen at the antenna working frequencies, the lastmentioned means comprising screen terminating impedance means space-coupled to the extremities of said screen wires.
  • An arrangement for controlling the radiation pattern of an antenna comprising a radiation screen made of a series of horizontal wires mounted in rearward spaced relation to the antenna, and means to terminate said screen in its characteristic impedance, the last-mentioned means comprising an auxiliary screen spacecoupled to the extremities of said radiation screen wires.
  • a directional antenna In combination, a directional antenna, a conductive network mounted rearwardly of said antenna and comprising a series of elongated spaced conductors, an impedance terminating means for said conductors comprising another series of short conductors mounted in radiationcoupled relation to the ends of said elongated conductors.
  • a directional antenna a conductive network mounted rearwardly of said antenna, said network comprising a first series of spaced horizontal wires and a second series of spaced horizontal wires mounted in spacecoupled relation to the end sections of the first series, the length of said second series of wires and their spacing with relation to the first series and with relation to said antenna being proportioned to render said network substantially aperiodic at the antenna operating frequencies.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Aerials With Secondary Devices (AREA)
US584596A 1945-03-19 1945-03-19 Beacon antenna system Expired - Lifetime US2524830A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE469846D BE469846A (en(2012)) 1945-03-19
US584596A US2524830A (en) 1945-03-19 1945-03-19 Beacon antenna system
ES172871A ES172871A1 (es) 1945-03-19 1946-03-13 Mejoras en sistemas de antena para sistemas radioeléctricos orientables
FR923933D FR923933A (fr) 1945-03-19 1946-03-18 Perfectionnements aux systèmes d'antennes dirigés
CH273990D CH273990A (de) 1945-03-19 1946-03-19 Bakenantennenanordnung.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US584596A US2524830A (en) 1945-03-19 1945-03-19 Beacon antenna system

Publications (1)

Publication Number Publication Date
US2524830A true US2524830A (en) 1950-10-10

Family

ID=24338004

Family Applications (1)

Application Number Title Priority Date Filing Date
US584596A Expired - Lifetime US2524830A (en) 1945-03-19 1945-03-19 Beacon antenna system

Country Status (5)

Country Link
US (1) US2524830A (en(2012))
BE (1) BE469846A (en(2012))
CH (1) CH273990A (en(2012))
ES (1) ES172871A1 (en(2012))
FR (1) FR923933A (en(2012))

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764441A (en) * 1924-08-04 1930-06-17 Hahnemann Walter Arrangement for directional transmission and reception by means of electric waves
FR704953A (fr) * 1930-01-24 1931-05-29 Radio Ind Projecteur d'ondes
US2204175A (en) * 1939-01-19 1940-06-11 Rca Corp Antenna system
US2226687A (en) * 1937-12-28 1940-12-31 Mackay Radio & Telegraph Compa Unidirectional v-type antenna system
US2282759A (en) * 1940-08-03 1942-05-12 Gavitt Mfg Company Antenna loop
US2292342A (en) * 1940-02-28 1942-08-04 Bell Telephone Labor Inc Reflecting system for antennas

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1764441A (en) * 1924-08-04 1930-06-17 Hahnemann Walter Arrangement for directional transmission and reception by means of electric waves
FR704953A (fr) * 1930-01-24 1931-05-29 Radio Ind Projecteur d'ondes
US2226687A (en) * 1937-12-28 1940-12-31 Mackay Radio & Telegraph Compa Unidirectional v-type antenna system
US2204175A (en) * 1939-01-19 1940-06-11 Rca Corp Antenna system
US2292342A (en) * 1940-02-28 1942-08-04 Bell Telephone Labor Inc Reflecting system for antennas
US2282759A (en) * 1940-08-03 1942-05-12 Gavitt Mfg Company Antenna loop

Also Published As

Publication number Publication date
ES172871A1 (es) 1946-04-16
CH273990A (de) 1951-03-15
BE469846A (en(2012))
FR923933A (fr) 1947-07-22

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