US2124424A - Antenna system - Google Patents
Antenna system Download PDFInfo
- 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
Links
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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
Landscapes
- Details Of Aerials (AREA)
- Transmitters (AREA)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL46868D NL46868C (fr) | 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 (fr) |
FR (1) | FR815759A (fr) |
GB (1) | GB467012A (fr) |
NL (1) | NL46868C (fr) |
Cited By (15)
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 (fr) * | 2007-03-30 | 2008-10-09 | Silver Spring Networks, Inc. | Antenne j-pôle |
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3420046A1 (de) * | 1984-05-29 | 1987-01-08 | Licentia Gmbh | Antennenanzuender fuer elektronische annaeherungs- oder abstandszuender |
-
0
- NL NL46868D patent/NL46868C/xx active
-
1936
- 1936-01-03 US US57343A patent/US2124424A/en not_active Expired - Lifetime
- 1936-12-31 FR FR815759D patent/FR815759A/fr not_active Expired
-
1937
- 1937-01-04 GB GB209/37A patent/GB467012A/en not_active Expired
Cited By (21)
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 (fr) * | 2007-03-30 | 2008-10-09 | Silver Spring Networks, Inc. | Antenne j-pôle |
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 |
---|---|
NL46868C (fr) | |
GB467012A (en) | 1937-06-09 |
FR815759A (fr) | 1937-07-22 |
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