US2124424A - Antenna system - Google Patents

Antenna system Download PDF

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Publication number
US2124424A
US2124424A US57343A US5734336A US2124424A US 2124424 A US2124424 A US 2124424A US 57343 A US57343 A US 57343A US 5734336 A US5734336 A US 5734336A US 2124424 A US2124424 A US 2124424A
Authority
US
United States
Prior art keywords
transmission line
antenna
impedance
section
conductor
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
US57343A
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English (en)
Inventor
Leeds Laurance Mcconnell
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.)
General Electric Co
Original Assignee
General Electric Co
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 NL46868D priority Critical patent/NL46868C/xx
Application filed by General Electric Co filed Critical General Electric Co
Priority to US57343A priority patent/US2124424A/en
Priority to FR815759D priority patent/FR815759A/fr
Priority to GB209/37A priority patent/GB467012A/en
Application granted granted Critical
Publication of US2124424A publication Critical patent/US2124424A/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
    • 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
    • H01Q9/30—Resonant antennas with feed to end of elongated active element, e.g. unipole
    • 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

Definitions

  • My' invention relates to a high frequency antenna system and moreparticularly to a means for feeding a half wave vertical antenna in such a manner as substantially to eliminate standing lel conductors 6 and 1 and a third'conductor 8 which closes the bottom of section 5.
  • An inn-- pedance matching section of this type is particularly well suited for connecting the transmission line to the antenna since it has a very low imevery respect as that described in Fig. 1 with the waves on the transmission line feeding the anpedance at its closed end and a relatively high 5 tenna. impedance at its open end.
  • wave vertical antenna has a desirable radiation at 9. field pattern for certain applications such as In order that energy may be transferred from police department use, because of its equal field transmissionline 2 to antenna l with minimum 10 intensity in all horizontal directions. Such an loss, standing waves must be eliminated from the antenna usually requires feeding from one end. transmission line. To achieve this result two Because of its high end impedance, an impedance conditions must be satisfied; first, the transmismatching transmission line section has been insion line at the pointwhere it is connected to the serted between the transmission line and the animpedance matching section must look into an- 15 tenna. Although in the prior art the surge imimpedance which is equal to the surge impedance pedance of the transmission line. has been of the transmission line; In the second place, it
  • the impedance 35 ing section in such a manner as to balance any matching section,and the antenna, are properly unequal loading placed on the impedance matchchosen so that this point on arm 1 also correing section by an antenna. 7 sponds to the point where conductor 3 must be
  • the novel features which Ibelieve to be charconnected to match the surge impedance of transiO acteristic of my invention are set forth with parmission line 2, standing waves will be substantial- 40 ticularity in the appended claims. My invention 1y eliminated from the transmission line.
  • I have in-' quarter wave conductor arm 1 was of #8 wire 'dicated at I a half wave vertical antenna and at spaced 13 inches from arm 6.
  • inner con- 50 2 a transmission line having an inner conductor ductor 3 was connected to arm 1 at a point 15 3 and an outer concentric conductor 4. Since inches above conductor 8, standing waves were the end impedance of the half wave vertical ansubstantially eliminated from transmission line 2,
  • the operation with pedance matching section 5 comprises two paralan open wire transmission line is the same in tionat a point of minimum potential, and the inner conductor .of said transmission, line being many modifications may be made both in the circuit arrangement and: in the instrument-antics" employed, and I therefore contemplate by the appended claims to cover all such modifications as fall within the true spirit and scope of my invention.
  • the combination comprising an impedance matching transmission line section having a high impedance at oneend and a substantially zero impedance at the other end, said section including two substantially parallel conducting arms, a half wave antenna connected to one arm of said impedance matching section at its high impedance end, and a two conductor transmission line, one of said conductors being connected to said impedance matching section at its minimum impedance point and said second conductor being connected to an intermediate point on the unloaded arm of saidimpedance matching section.
  • the combination comprising an impedance matching transmission line section having a'high impedance at one end, a substantially zero impedanceat the other end, said section including two substantially parallel conducting arms, a half wave antenna connected to one arm of said impedance matching section at its high impedance end, and a concentric transmission line, the outer conductor of said transmission line being connected to said impedance matching secconnected to an intermediate point on the unloaded arm of said impedance matching section.
  • the combination comprising a half wave antenna, a transmission line, an impedance matching transmission line section including two substantially parallel conducting arms connecting said antenna to said transmission line, said arms being electrically connected together at one end, said antenna being connected to one arm of said impedance matching section at its open end, and said transmission line being connected to said impedance matching section at said electrically connected ends and to an in-. termediate point on the other of said arms,- thereby to balance the unbalanced load placed on said impedance matching section by said antenna and thereby substantially to eliminate standing waves on saidtransmission line.
  • the combination comprising a half wave antenna, a transmission line, and an impedance matching transmission line section including two' substantially parallel conducting arms connecta ing said antenna to said transmission line, said transmission line being connected to said arms of said impedance matching section at different distances respectively along said section, thereby to balance-the loading of said impedance matching section to substantially eliminate standing waves on saidtransmission line.
  • the combination comprising an impedance matching transmission line section including two substantially parallel conducting arms having one end electrically closed a half wave end fed. antenna connected to one arm of said impedance matching section at its open end, and means for transmitting high frequency signals to said impedancematching section, said means including means for balancing the unequal loading imposed on said impedance matching section by said antenna.
  • an antenna In combination, an antenna, a transmission line, and an impedance matching transmission line section, said antenna and transmission line each being connected to said transmission line section in an. unbalanced relation thereto, and means to match the unbalance produced by said antenna by the unbalance produced by said transmission line, to cause said transmission line to' operate into .a balanced load.
  • a transmission line having one conductor thereof extending beyond the end of the other conductor to form an antenna, a second conductor shorter than said first conductor connected to said one conductor at the point substantially adjacent the end of the other conductor and having a length substantially equal to a quarter of a'wavelength of the wave on which said vantenna operates, and. means to connect said other conductor to said second conductor at a point thereof selected to produce a minimum of standing waves on said transmission line.
  • a transmission line having one conductor thereof extending beyond the end of the other conductor to form an antenna, a second conductor shorter than said first conductor'connected to said one conductor at a point substantiallyadjacent the end of said other con ductoriand extending substantially parallel to tenna operates, and means to connect said end i of said other conductor to said second conductor at a point thereof between the ends thereof.
  • a transmission line comprising two conductors having a length of a quarter of a wavelength, of the wave on which said transmission line operates, said conductors being connected together at one end'and open at the other, end, an antenna connected to said other end ofone of, said conductors, a high frequency apparatus, and means including said high frequency apparatus to connect said one end to the'other conductor at a point thereof intermediate the ends thereof.
  • a transmission line comprising two ,conductors having a length of a quarter, of 'a wavelength of the Wave on which said transmission line operates, said conductors being connectedtogethe'r at one end and open at the, otherend, an antenna connected to said other end of one of said conductors and high frequency apparatus connected between said two conductors'at different points along the length thereof selected in accordance with the resistance at the end of said antenna adjacent the end of said one conductor to which end said antenna is connected

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  • Details Of Aerials (AREA)
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US57343A 1936-01-03 1936-01-03 Antenna system Expired - Lifetime US2124424A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
NL46868D NL46868C (US07534539-20090519-C00280.png) 1936-01-03
US57343A US2124424A (en) 1936-01-03 1936-01-03 Antenna system
FR815759D FR815759A (fr) 1936-01-03 1936-12-31 Perfectionnements aux systèmes d'alimentation d'une antenne
GB209/37A GB467012A (en) 1936-01-03 1937-01-04 Improvements relating to antenna systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57343A US2124424A (en) 1936-01-03 1936-01-03 Antenna system

Publications (1)

Publication Number Publication Date
US2124424A true US2124424A (en) 1938-07-19

Family

ID=22009998

Family Applications (1)

Application Number Title Priority Date Filing Date
US57343A Expired - Lifetime US2124424A (en) 1936-01-03 1936-01-03 Antenna system

Country Status (4)

Country Link
US (1) US2124424A (US07534539-20090519-C00280.png)
FR (1) FR815759A (US07534539-20090519-C00280.png)
GB (1) GB467012A (US07534539-20090519-C00280.png)
NL (1) NL46868C (US07534539-20090519-C00280.png)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702345A (en) * 1949-08-25 1955-02-15 Walter Ludwig Radiation and interception of electromagnetic waves
US2941204A (en) * 1955-06-16 1960-06-14 Arnold B Bailey Antenna mount
FR2420856A1 (fr) * 1978-03-22 1979-10-19 Tno Antenne toutes ondes omnidirectionnelle
US4254420A (en) * 1980-01-07 1981-03-03 Peoples John C Whip antenna of reduced length for VHF radio communication
US4259673A (en) * 1979-06-05 1981-03-31 Harold Guretzky Stub matched antenna and method of feeding same
FR2539557A1 (fr) * 1983-01-13 1984-07-20 Lerc Lab Etudes Rech Chim Antenne a large bande
US4644364A (en) * 1984-12-07 1987-02-17 Parks Malcolm G Method of and means for coupling a two conductor transmission line to an antenna
US5451971A (en) * 1993-07-13 1995-09-19 Motorola, Inc. Combined J-pole and transmission line antenna
US5600339A (en) * 1994-12-06 1997-02-04 Oros; Edward A. Antenna
WO2008121381A1 (en) * 2007-03-30 2008-10-09 Silver Spring Networks, Inc. A j-pole antenna
US20090295669A1 (en) * 2008-05-27 2009-12-03 Saou-Wen Su Wire Antenna
US20120119968A1 (en) * 2010-11-15 2012-05-17 Edison Fong Radial-free collinear omni-directional antenna with gain and virtual ground
US9608336B1 (en) * 2015-08-25 2017-03-28 Edison Fong Radial-free collinear omni-directional triband half wavelength antenna with virtual ground, single coaxial cable feedpoint, and with minimal interaction of adjustment between bands
USD798847S1 (en) 2016-01-07 2017-10-03 The United States of America as represented by the Federal Bureau of Investigation, Dept. of Justice Antenna
US10468743B2 (en) 2016-01-07 2019-11-05 United States of America as represented by the Federal Bureau of Investigation, Dept. of Justice Mast mountable antenna

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3420046A1 (de) * 1984-05-29 1987-01-08 Licentia Gmbh Antennenanzuender fuer elektronische annaeherungs- oder abstandszuender

Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2702345A (en) * 1949-08-25 1955-02-15 Walter Ludwig Radiation and interception of electromagnetic waves
US2941204A (en) * 1955-06-16 1960-06-14 Arnold B Bailey Antenna mount
FR2420856A1 (fr) * 1978-03-22 1979-10-19 Tno Antenne toutes ondes omnidirectionnelle
US4441108A (en) * 1978-03-22 1984-04-03 U.S. Philips Corporation Omnidirectional multiple-band antenna
US4259673A (en) * 1979-06-05 1981-03-31 Harold Guretzky Stub matched antenna and method of feeding same
US4254420A (en) * 1980-01-07 1981-03-03 Peoples John C Whip antenna of reduced length for VHF radio communication
FR2539557A1 (fr) * 1983-01-13 1984-07-20 Lerc Lab Etudes Rech Chim Antenne a large bande
EP0116487A1 (fr) * 1983-01-13 1984-08-22 Laboratoire D'etudes Et De Recherches Chimiques L.E.R.C. S.A. Antenne à plan de sol
US4644364A (en) * 1984-12-07 1987-02-17 Parks Malcolm G Method of and means for coupling a two conductor transmission line to an antenna
US5451971A (en) * 1993-07-13 1995-09-19 Motorola, Inc. Combined J-pole and transmission line antenna
US5600339A (en) * 1994-12-06 1997-02-04 Oros; Edward A. Antenna
WO2008121381A1 (en) * 2007-03-30 2008-10-09 Silver Spring Networks, Inc. A j-pole antenna
US20090102737A1 (en) * 2007-03-30 2009-04-23 Thomas Birnbaum J-pole antenna
US7859477B2 (en) 2007-03-30 2010-12-28 Silver Spring Networks, Inc. J-pole antenna
US20090295669A1 (en) * 2008-05-27 2009-12-03 Saou-Wen Su Wire Antenna
US8797215B2 (en) * 2008-05-27 2014-08-05 Lite-On Electronics (Guangzhou) Limited Wire antenna
US20120119968A1 (en) * 2010-11-15 2012-05-17 Edison Fong Radial-free collinear omni-directional antenna with gain and virtual ground
US8947313B2 (en) * 2010-11-15 2015-02-03 Edison Fong Radial-free collinear omni-directional antenna with gain and virtual ground
US9608336B1 (en) * 2015-08-25 2017-03-28 Edison Fong Radial-free collinear omni-directional triband half wavelength antenna with virtual ground, single coaxial cable feedpoint, and with minimal interaction of adjustment between bands
USD798847S1 (en) 2016-01-07 2017-10-03 The United States of America as represented by the Federal Bureau of Investigation, Dept. of Justice Antenna
US10468743B2 (en) 2016-01-07 2019-11-05 United States of America as represented by the Federal Bureau of Investigation, Dept. of Justice Mast mountable antenna

Also Published As

Publication number Publication date
FR815759A (fr) 1937-07-22
NL46868C (US07534539-20090519-C00280.png)
GB467012A (en) 1937-06-09

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