EP0137391A1 - Cellular mobile communications antenna - Google Patents

Cellular mobile communications antenna Download PDF

Info

Publication number
EP0137391A1
EP0137391A1 EP84111340A EP84111340A EP0137391A1 EP 0137391 A1 EP0137391 A1 EP 0137391A1 EP 84111340 A EP84111340 A EP 84111340A EP 84111340 A EP84111340 A EP 84111340A EP 0137391 A1 EP0137391 A1 EP 0137391A1
Authority
EP
European Patent Office
Prior art keywords
antenna
plate
conductive
coupling
base
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.)
Granted
Application number
EP84111340A
Other languages
German (de)
French (fr)
Other versions
EP0137391B1 (en
Inventor
James Hadzoglou
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.)
Allen Telecom LLC
Original Assignee
Orion Industries Inc
Allen Telecom Group Inc
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=24133532&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0137391(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Orion Industries Inc, Allen Telecom Group Inc filed Critical Orion Industries Inc
Priority to AT84111340T priority Critical patent/ATE88837T1/en
Publication of EP0137391A1 publication Critical patent/EP0137391A1/en
Application granted granted Critical
Publication of EP0137391B1 publication Critical patent/EP0137391B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/1271Supports; Mounting means for mounting on windscreens
    • H01Q1/1285Supports; Mounting means for mounting on windscreens with capacitive feeding through the windscreen
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/12Supports; Mounting means
    • H01Q1/1207Supports; Mounting means for fastening a rigid aerial element
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01QANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00Details of, or arrangements associated with, antennas
    • H01Q1/27Adaptation for use in or on movable bodies
    • H01Q1/32Adaptation for use in or on road or rail vehicles
    • H01Q1/325Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle
    • H01Q1/3283Adaptation for use in or on road or rail vehicles characterised by the location of the antenna on the vehicle side-mounted antennas, e.g. bumper-mounted, door-mounted

Definitions

  • the present invention relates to communications antennas and more particularly to mobile communications antennas for frequencies in the area of the 800MHz frequency band of the type adapted to be mounted on a non-conductive surface such as a vehicle windshield.
  • mobile antennas for such communications systems are designed to be mounted on vehicles. Some type of permanent installation is often necessary. For preferred locations, those which provide the most uniform radiation patterns, such as roof tops, this requires mounting to the vehicle such as automobiles by cutting holes into the body and permanently mounting the antennas in place. This is not always a satisfactory arrangement for vehicle owners.
  • the antenna system there specifically disclosed is particularly adapted for operation at frequencies well below the frequencies used for cellular phone communication systems.
  • the antenna there disclosed was designed for operation in the CB and related bands of about 28-29 MHz.
  • the antenna disclosed in the aforesaid patent is a relatively narrow band antenna which does not operate satisfactorily over the wide frequency bands which are required for cellular phone systems.
  • a communications antenna adapted to operate at and above the 800 MHz frequency band which is designed for mounting on an insulated surface such as the windshield of an automotive vehicle and which provides excellent efficiency and gain as well as the desirable band width to allow for efficient use at the cellular communications frequencies under consideration.
  • a vehicle window e.g., the windshield is utilized to efficiently couple RF energy to a two-element collinear radiator mounted on the external surface of the windshield.
  • a specially designed coupler configuration is mounted on the inner surface of the window in proximity to the antenna mount. The coupler reactively couples the radiator element to a transmission line while providing the desired 50 ohm input impedence.
  • the coupler in accordance with the present invention together with the radiator designed for use therewith provides desired VSWR characteristics over the operating band ranges of 60 to 80 MHz such as contemplated for use in cellular telephone systems.
  • the window mounted antenna incorporating the present invention is capable of providing radiation characteristics comparable to antennas mounted on the roof tops of vehicles, provides desired omni-directional coverage and satisfactory gain without the distortion which may arise from mounting antennas on trunk lids and other less satisfactory locations on a vehicle.
  • the communications antenna system incorporatiog the present invention utilizes a collinear radiator having a 5/8 wave-length upper radiator and a lower radiator having an electrical length of between about 1/4 and 1/2 wave-length separated by an air-wound phasing coil.
  • the coupling or feed assembly is incorporated in a conductive housing which acts as a counterpoise. Disposed within the conductive housing are the components defining a coupling capacitor plate, and the tuned circuit utilized to tune the antenna and couple the radiator mounted on the external surface of the glass to the transmission line.
  • the coupling capacitor plate forming a part of the feed housing is a printed circuit foil embedded in a dielectric sheet forming one side of the housing.
  • the plate of the coupling capacitor also acts as the plate of the adjustable tuning capacitor.
  • the other plate of the tuning capacitor is a generally U-shaped member.
  • the base of the U is affixed to and in contact with the metallic housing forming the counterpoise.
  • One leg of the U shaped plate, oriented at substantially 90° to the base, provides the ground or shield connection to a transmission line connector.
  • the second leg forms the other plate of the tuning capacitor.
  • the second leg extends at an obtuse angle to the base of the U and has a free end bent back to form a return oriented generally parallel to the base thereof.
  • the return portion extends over at least a portion of the coupling plate or embedded foil element to define the adjustable coupling capacitor.
  • the adjustment of the capacitor is achieved by adjusting the position of the free end return and thereby adjusting the amount of overlap between that plate of the tuning capacitor and the foil coupling plate.
  • the dielectric member in which the coupling plate is embedded forms the closure for the conductive housing or counterpoise.
  • the inductor is defined by a straight wire having a dimension suitable to the frequencies at which the antenna is to be tuned.
  • the wire extends between and is electrically connected to the base of the generally U-shaped conductor and the foil coupling plate.
  • the center conductor of the transmission line connector is electrically connected to the inductor at an appropriate tap point along its length whereby the impedence of the tuning circuit is matched to the 50 ohm impedence of the transmission line.
  • an antenna system capable of producing omni-directional radiation at and above the 800MHz band having a band width defined by a VSWR less than 1.5 over a range of about 60-80 MHz rendering the antenna suitable for use as a cellular phone system antenna providing desired gain and band width capabilities.
  • the transmission line connecting the antenna to the transistor is not hot, thereby eliminating one safety concern.
  • the antenna system includes an elongated collinear radiator 10 comprising an upper section 10a having an electrical length of approximately 5/8 wavelength, and lower section 10b having an electrical length in excess of 1/4 wavelength separated by an air wound phasing coil 10c having a length suitable for proper phasing at the frequency at which the antenna is to be used.
  • the radiator terminates in a base or foot 12 such as one shown in U.S. Patent No. 4,266,227 having a generally flat surface adapted to be suitably affixed to the outer surface of a dielectric member such as a windshield 14 of a vehicle 16.
  • a coupling or feed assembly 20 is affixed to the inner surface of the windshield 14 juxtaposed to the antenna base member 12.
  • the feed assembly 20 includes a conductive housing 22 having a front wall 24 and four side walls 26 with an open back 28.
  • the conductive housing acts as a counterpoise for the antenna system and thereby results in the feed or transmission line between the antenna system and the transceiver remaining "cold".
  • the open back 28 is closed by a dielectric circuit board 30 having formed therein a conductive foil plate 33 which defines the second plate of a coupling capacitor 34 on opposite sides of the windshield 14.
  • the inner coupling plate 33 also forms one plate of an adjustable tuning capacitor.
  • the other plate of capacitor 3 , 0. is defined by a generally U-shaped bent member 38 having a generally planar base portion 38a lying along and affixed to the inner surface of front wall 24 of the conductive housing 22.
  • a standard transmission line coaxial connector 42 is disposed in one side wall 26a of the housing 22.
  • the shield connection of the connector 42 is electrically connected to the housing 22 and to one leg 38b of the second tuning capacitor plate or U-shaped member 38 disposed generally perpendicular to the base 38a of the capacitor plate.
  • the other free leg 38c of the bent member 38 extends at a generally obtuse angle from the base 38 with the free end bent back to form a return 38d which overlaps and is spaced from the foil coupling plate 33.
  • Adjustment of the capacitor 36 is achieved by utilizing a non-conductive member 44 which passes through the side wall 26b and engages the free end or leg 38c of the tuning capacitor plate 38 to displace the leg 38c inwardly and outwardly. This adjusts the amount of overlap between the capacitor plate return 38d and the coupling plate 33 to adjust the amount of capacitance thereof as is well known.
  • An inductor 46 in the form of a straight wire having a diameter to produce an inductance appropriate to the frequency to which the system is to be tuned is electrically connected to the base 38a of the adjustable capacitor plate 38 and to the foil 33 formed in the PC board dielectric.
  • the center conductor 48 of the transmission line connector 42 is electrically connected to the inductor/wire 46 at a point between its ends to match the impedance of the transmission line itself of about 50 ohms.
  • a system so constructed is capable of providing significant band width over the desired range of at least about 60 to 80 MHz.
  • an antenna was tuned at 806 MHz and maintained a VSWR below 1.5 between frequencies of about 800 MHz and about 860 MHz as shown at A in Fig. 6.
  • An antenna tuned to 820 MHz maintained VSWR equal or less than 1.5 between a frequency of about 802 MHz to excess of 865 MHz as shown in B in Fig. 6.
  • Another antenna that was designed for use in the 821-896 MHz band maintained a VSWR at or below 1.5 between the frequencies of 820 MHz and 895 MHz, as shown in Fig. 7.
  • Such an antenna system was able to provide a uniform radiation pattern as a function of radiation angle with a uniformity substantially similar to a roof mounted antenna and substantially better than trunk and cowl mounted antennas.
  • Such uniformity is especially important for cellular phone type systems since communications using such systems occur in all directions and any reduction of gain in any particular direction would adversely affect the quality and ability of the mobile system to maintain communications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Remote Sensing (AREA)
  • Details Of Aerials (AREA)
  • Support Of Aerials (AREA)
  • Transceivers (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)

Abstract

A mobile antenna system for use at frequencies in and above the 800 MHz band having a collinear radiator (10) mounted on one surface of a dielectric (14) such as the window of a vehicle and a tunable coupling circuit disposed internally of a conducted housing (22) mounted on the opposite surface of the dielectric (14) which acts as a counterpoise for coupling RF energy between the radiator (10) and a transmission line (42) connected to a suitable transceiver

Description

    Field of the Invention
  • The present invention relates to communications antennas and more particularly to mobile communications antennas for frequencies in the area of the 800MHz frequency band of the type adapted to be mounted on a non-conductive surface such as a vehicle windshield.
  • Background of the Invention
  • The recent introduction of cellular telephone service which utilize frequencies in the 800MHz frequency band and above, has increased interest in the efficient mobile antenna systems for those frequencies. Such services typically utilize a fairly wide band width. For example, existing and/or proposed systems operate over frequency bands of about 800-870 MHz, 820-900 MHz and 860-840 MHz. As can be seen by the above figures, the band width of such operating systems ranges from between about 60 to about_80 MHz. Thus, any antenna designed for use with such systems should provide efficient radiation characteristics and low VSWR over these band widths.
  • In addition, mobile antennas for such communications systems are designed to be mounted on vehicles. Some type of permanent installation is often necessary. For preferred locations, those which provide the most uniform radiation patterns, such as roof tops, this requires mounting to the vehicle such as automobiles by cutting holes into the body and permanently mounting the antennas in place. This is not always a satisfactory arrangement for vehicle owners.
  • Alternate mounting locations, such as fenders or trunk lids, which may allow for different mounting techniques, result in deterioration in the desired uniformity in the radiation pattern. It would be desirable, therefore to have an antenna which could operate at these UHF frequencies and which at the same time could provide the desired operating characteristics without requiring the mounting arrangements that permanently mar a vehicle and require body repair when the antenna system is removed from the vehicle.
  • The mounting of a communications antenna on insulated surfaces such as the windshield of an automotive vehicle is known for much lower frequencies. One such an antenna system is disclosed in commonly assigned U.S. Patent No. 4,238,799 which issued on December 9, 1980, incorporated herein by reference.
  • The antenna system there specifically disclosed is particularly adapted for operation at frequencies well below the frequencies used for cellular phone communication systems. Thus, the antenna there disclosed was designed for operation in the CB and related bands of about 28-29 MHz.
  • Antennas similar to and adapted from the antenna disclosed in the aforesaid U.S. Patent No. 4,238,799 have been designed and operate at somewhat higher frequencies than those disclosed in that patent. However, although the electrical schematic representation of the circuit remains the same as that shown in Fig. 4 of that patent, as frequencies increase and reach the frequencies utilized in cellular phone systems, those at and above the 800 MHz band, the structure utilized for lower frequencies is no longer appropriate.
  • Furthermore, the antenna disclosed in the aforesaid patent is a relatively narrow band antenna which does not operate satisfactorily over the wide frequency bands which are required for cellular phone systems.
  • Summary of the Invention
  • In accordance with the present invention, there is provided a communications antenna adapted to operate at and above the 800 MHz frequency band which is designed for mounting on an insulated surface such as the windshield of an automotive vehicle and which provides excellent efficiency and gain as well as the desirable band width to allow for efficient use at the cellular communications frequencies under consideration.
  • In accordance with the present invention, a vehicle window, e.g., the windshield is utilized to efficiently couple RF energy to a two-element collinear radiator mounted on the external surface of the windshield. In order to couple the RF energy between the antenna and a transceiver, a specially designed coupler configuration is mounted on the inner surface of the window in proximity to the antenna mount. The coupler reactively couples the radiator element to a transmission line while providing the desired 50 ohm input impedence.
  • The coupler in accordance with the present invention together with the radiator designed for use therewith provides desired VSWR characteristics over the operating band ranges of 60 to 80 MHz such as contemplated for use in cellular telephone systems.
  • In accordance with the present invention, specially designed tuning circuit elements are utilized and are disposed in a conductive coupler box which acts as a counterpoise for the antenna radiator. The window mounted antenna incorporating the present invention is capable of providing radiation characteristics comparable to antennas mounted on the roof tops of vehicles, provides desired omni-directional coverage and satisfactory gain without the distortion which may arise from mounting antennas on trunk lids and other less satisfactory locations on a vehicle.
  • More specifically, the communications antenna system incorporatiog the present invention utilizes a collinear radiator having a 5/8 wave-length upper radiator and a lower radiator having an electrical length of between about 1/4 and 1/2 wave-length separated by an air-wound phasing coil.
  • One advantage of the glass mounted antenna system as set forth in the above-mentioned patent is the elimination of the ground plane and the resultant uniformity of radiation pattern independent of vehicle configuration. At the frequencies at which the assembly incorporating the present invention is used, however, one problem that arises is that the transmission line connecting the antenna assembly to the transceiver becomes "hot".
  • In order to eliminate this problem, the coupling or feed assembly is incorporated in a conductive housing which acts as a counterpoise. Disposed within the conductive housing are the components defining a coupling capacitor plate, and the tuned circuit utilized to tune the antenna and couple the radiator mounted on the external surface of the glass to the transmission line.
  • The configuration of the components disposed within the coupling or feed housing are significantly different than those that were suitable for use in the antenna disclosed in the aforesaid patent. Thus, the coupling capacitor plate forming a part of the feed housing is a printed circuit foil embedded in a dielectric sheet forming one side of the housing. The plate of the coupling capacitor also acts as the plate of the adjustable tuning capacitor The other plate of the tuning capacitor is a generally U-shaped member. The base of the U is affixed to and in contact with the metallic housing forming the counterpoise. One leg of the U shaped plate, oriented at substantially 90° to the base, provides the ground or shield connection to a transmission line connector. The second leg forms the other plate of the tuning capacitor. The second leg extends at an obtuse angle to the base of the U and has a free end bent back to form a return oriented generally parallel to the base thereof. The return portion extends over at least a portion of the coupling plate or embedded foil element to define the adjustable coupling capacitor.
  • The adjustment of the capacitor is achieved by adjusting the position of the free end return and thereby adjusting the amount of overlap between that plate of the tuning capacitor and the foil coupling plate. The dielectric member in which the coupling plate is embedded forms the closure for the conductive housing or counterpoise.
  • The inductor is defined by a straight wire having a dimension suitable to the frequencies at which the antenna is to be tuned. The wire extends between and is electrically connected to the base of the generally U-shaped conductor and the foil coupling plate. The center conductor of the transmission line connector is electrically connected to the inductor at an appropriate tap point along its length whereby the impedence of the tuning circuit is matched to the 50 ohm impedence of the transmission line.
  • By utilizing a through-the-glass antenna assembly in accordance with the present invention, there is provided an antenna system capable of producing omni-directional radiation at and above the 800MHz band having a band width defined by a VSWR less than 1.5 over a range of about 60-80 MHz rendering the antenna suitable for use as a cellular phone system antenna providing desired gain and band width capabilities. At the same time, by use of the antenna system incorporating the present invention, the transmission line connecting the antenna to the transistor is not hot, thereby eliminating one safety concern.
  • Numerous other advantages and features of the present invention will become readily apparent from the following detailed description of the invention and the embodiments thereof, from the claims and from the accompanying drawings in which the details of the invention are fully and completely disclosed as a part of this specification.
  • Brief Description of the Drawings
    • Fig. 1 is a perspective view showing installation of an antenna on a windshield;
    • Fig. 2 is an enlarged cross-section taken along lines 2-2 of Fig. 1;
    • Fig. 3 is a perspective view, partially broken away of a feed or coupling assembly in accordance with the present invention;
    • Fig. 4 is an elevation of the coupling housing;
    • Fig. 5 is an elevation showing a suitable antenna radiator; and
    • Figs. 6 and 7 are VSWR plots for the antenna incorporating the present invention.
    Detailed Description of a Preferred Embodiment
  • From the foregoing, it will be observed that numerous variations and modifications may be effected without departing from the true spirit and scope of the novel concept of the invention. It is to be understood that no limitation with respect to the specific apparatus illustrated herein is intended or should be inferred. It is, of course, intended to cover by the appended claims all such modifications as fall within the scope of the claims.
  • Referring to the drawings there is shown an antenna system incorporating the present invention. The antenna system includes an elongated collinear radiator 10 comprising an upper section 10a having an electrical length of approximately 5/8 wavelength, and lower section 10b having an electrical length in excess of 1/4 wavelength separated by an air wound phasing coil 10c having a length suitable for proper phasing at the frequency at which the antenna is to be used.
  • The radiator terminates in a base or foot 12 such as one shown in U.S. Patent No. 4,266,227 having a generally flat surface adapted to be suitably affixed to the outer surface of a dielectric member such as a windshield 14 of a vehicle 16. A coupling or feed assembly 20 is affixed to the inner surface of the windshield 14 juxtaposed to the antenna base member 12.
  • The feed assembly 20 includes a conductive housing 22 having a front wall 24 and four side walls 26 with an open back 28. The conductive housing acts as a counterpoise for the antenna system and thereby results in the feed or transmission line between the antenna system and the transceiver remaining "cold". The open back 28 is closed by a dielectric circuit board 30 having formed therein a conductive foil plate 33 which defines the second plate of a coupling capacitor 34 on opposite sides of the windshield 14.
  • The inner coupling plate 33 also forms one plate of an adjustable tuning capacitor. The other plate of capacitor 3, 0. is defined by a generally U-shaped bent member 38 having a generally planar base portion 38a lying along and affixed to the inner surface of front wall 24 of the conductive housing 22. A standard transmission line coaxial connector 42 is disposed in one side wall 26a of the housing 22. The shield connection of the connector 42 is electrically connected to the housing 22 and to one leg 38b of the second tuning capacitor plate or U-shaped member 38 disposed generally perpendicular to the base 38a of the capacitor plate.
  • The other free leg 38c of the bent member 38 extends at a generally obtuse angle from the base 38 with the free end bent back to form a return 38d which overlaps and is spaced from the foil coupling plate 33. Adjustment of the capacitor 36 is achieved by utilizing a non-conductive member 44 which passes through the side wall 26b and engages the free end or leg 38c of the tuning capacitor plate 38 to displace the leg 38c inwardly and outwardly. This adjusts the amount of overlap between the capacitor plate return 38d and the coupling plate 33 to adjust the amount of capacitance thereof as is well known.
  • An inductor 46 in the form of a straight wire having a diameter to produce an inductance appropriate to the frequency to which the system is to be tuned is electrically connected to the base 38a of the adjustable capacitor plate 38 and to the foil 33 formed in the PC board dielectric. The center conductor 48 of the transmission line connector 42 is electrically connected to the inductor/wire 46 at a point between its ends to match the impedance of the transmission line itself of about 50 ohms.
  • A system so constructed is capable of providing significant band width over the desired range of at least about 60 to 80 MHz. For example, in one embodiment of the antenna system incorporating the present invention an antenna was tuned at 806 MHz and maintained a VSWR below 1.5 between frequencies of about 800 MHz and about 860 MHz as shown at A in Fig. 6. An antenna tuned to 820 MHz maintained VSWR equal or less than 1.5 between a frequency of about 802 MHz to excess of 865 MHz as shown in B in Fig. 6. Another antenna that was designed for use in the 821-896 MHz band maintained a VSWR at or below 1.5 between the frequencies of 820 MHz and 895 MHz, as shown in Fig. 7.
  • Such an antenna system was able to provide a uniform radiation pattern as a function of radiation angle with a uniformity substantially similar to a roof mounted antenna and substantially better than trunk and cowl mounted antennas. Such uniformity is especially important for cellular phone type systems since communications using such systems occur in all directions and any reduction of gain in any particular direction would adversely affect the quality and ability of the mobile system to maintain communications.
  • Thus there has been dislcosed a mobile communications antenna system capable of use in the 800 MHz frequency band and above which does not require affixing to the metallic or conductive surface of a vehicle with the resulting damage thereto, which provides desired uniformity of transmission as a function of horizontal angle which provides satisfactory gain in all direction and which eliminates any concern or problem of having a hot cable disposed within the passenger compartment of such vehicles.
  • While this invention is susceptible of embodiment in many different forms, there is shown in the drawing and will be described herein in detail a specific embodiment thereof with the understanding that the present disclosure is to be considered as an exemplification of the principles of the invention and is not intended to limit the invention to the specific embodiment illustrated.

Claims (8)

1. A mobile communications antenna for use in UHF frequencies at least as high as 800 MHz comprising:
- an elongated radiating member (10) attached at one end to a conductive base member (12) affixed to the outer surface of a non-conductive base member (14) affixed to a non-conductive dielectric member (30) of said a vehicle (16); and
- a coupling system disposed on the inner surface of said dielectric member (30) and juxtaposed with said antenna base (12), said coupling system including a conductive housing (20) defining a counterpoise for said antenna system and a plate member (33) juxtaposed with said base (12) to define therewith a coupling capacitor (34) for RF energy, said plate member be-ing electrically insulated from said conductive housing (22), a tuned circuit connected to said coupling member (33) and disposed within said counterpoise housing (22) for tuning said antenna system to a desired frequency within said 800 MHz band, and a connector member (42) for a coaxial transmission line electrically connected to said tuned circuit at a point at which the impedance of the transmission line connected to said connector (42) and said tuned circuit is substantially the same.
2. An antenna as claimed in claim 1 wherein said coupling plate (33) is a printed foil
circuit formed in a non-conductive member (30), said dielectric member (30) closing one side of said housing (22); and including means for affixing said non-conductive closing member (30) to the inner surface of said vehicle dielectric member (14) with the foil generally juxtaposed with said antenna base (12).
3. An antenna as claimed in claim 2 wherein said tuned circuit comprised an adjustable capacitor (36) and an inductor (46) connected in parallel therewith, said foil coupling plate (33) being one plate of said tuning capacitor (36), and the other plate comprising a generally U-shaped conductive plate (38) having a base portion (38a) affixed to a conductive wall (24) of said housing (22), a first leg (38b) connected to said connector (42) and a second adjustable leg (38c) having a free portion (38d) juxtaposed and spaced from said foil coupling plate (33).
4. An antenna as claimed in claim 3 including means (44) for adjusting the degree of juxtaposition between the plates (33, 38d) of said tuning capacitor (38).
5. An antenna as claimed in claim 4 wherein said inductor (46) is a straight wire extending between and connected to said foil plate (33) and the house of said U-shaped plate (38).
6. An antenna as claimed in claim 5 wherein said connector (42) is a coaxial connector having a shield contact connected to said first leg (38b) and said conductive housing (22) and a center connector (48) connected to said inductor wire (46) intermediate its ends.
7. An antenna as claimed in claim 6 wherein said radiator is a collinear radiator (10) having a first portion (10a) having a length about equal to 3/4 wavelength, a second portion (10b) including said base having a length between about 1/4 and 1/2 wavelength, and a phasing coil (lOc) therebetween.
EP84111340A 1983-09-23 1984-09-21 Cellular mobile communications antenna Expired - Lifetime EP0137391B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84111340T ATE88837T1 (en) 1983-09-23 1984-09-21 ANTENNA FOR MOBILE TELEPHONE TRAFFIC.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US53527383A 1983-09-23 1983-09-23
US535273 1983-09-23

Publications (2)

Publication Number Publication Date
EP0137391A1 true EP0137391A1 (en) 1985-04-17
EP0137391B1 EP0137391B1 (en) 1993-04-28

Family

ID=24133532

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84111340A Expired - Lifetime EP0137391B1 (en) 1983-09-23 1984-09-21 Cellular mobile communications antenna

Country Status (7)

Country Link
EP (1) EP0137391B1 (en)
JP (1) JPS6077501A (en)
AT (1) ATE88837T1 (en)
CA (1) CA1223339A (en)
DE (1) DE3486135T2 (en)
NZ (1) NZ209019A (en)
ZA (1) ZA845849B (en)

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4658259A (en) * 1985-03-06 1987-04-14 Blaese Herbert R On-glass antenna
EP0279117A1 (en) * 1987-01-22 1988-08-24 Herbert Rudolph Blaese Modified on-glass antenna
AU577539B2 (en) * 1983-09-23 1988-09-29 Allen Telecom Inc. Mobile communications antenna
US4785305A (en) * 1987-04-20 1988-11-15 Don Shyu Glass-mountable antenna assembly with microstrip filter
US4794319A (en) * 1986-07-03 1988-12-27 Alliance Research Corporation Glass mounted antenna
US4825217A (en) * 1987-10-19 1989-04-25 Tae Lim Electronics Co., Ltd. Car phone antenna assembly
US4857939A (en) * 1988-06-03 1989-08-15 Alliance Research Corporation Mobile communications antenna
GB2218852A (en) * 1988-05-16 1989-11-22 Antenna Co Antenna for a cellular mobile telephone
EP0358529A1 (en) * 1988-09-09 1990-03-14 Bantex Limited Antenna for mounting on a non-conductive surface, such as a window of a vehicle
US4916456A (en) * 1989-05-12 1990-04-10 Don Shyu Glass-mountable antenna assembly
US4931805A (en) * 1988-05-16 1990-06-05 The Antenna Company Adhesive system and method for mounting a cellular telephone antenna
WO1990011627A1 (en) * 1989-03-17 1990-10-04 Allgon Ab Mobile communications antenna
US4992800A (en) * 1989-01-23 1991-02-12 Martino Research & Development Co. Windshield mounted antenna assembly
USRE33743E (en) * 1985-03-06 1991-11-12 On-glass antenna
GB2245430A (en) * 1990-04-09 1992-01-02 Panorama Antennas Ltd Matching element for mobile antenna
GB2250637A (en) * 1990-12-05 1992-06-10 Leslie James Wallen Isolated antenna bases
US5262795A (en) * 1990-01-30 1993-11-16 Cellular Ic, Inc. Unitary cellular antenna system
US5463405A (en) * 1994-05-20 1995-10-31 Valor Enterprises, Inc. Cellular telephone coupling network
WO1997028575A1 (en) * 1996-01-30 1997-08-07 Heed Bjoern Antenna

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0553312U (en) * 1991-12-17 1993-07-13 コメット株式会社 Mobile communication antenna device
DE4443596B4 (en) * 1994-12-07 2004-12-16 Heinz Prof. Dr.-Ing. Lindenmeier Radio antenna on the window pane of a motor vehicle

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130888A1 (en) * 1970-07-17 1972-01-20 Philips Nv Coaxial antenna junction box
DE2257352A1 (en) * 1972-11-22 1974-05-30 Kathrein Werke Kg VEHICLE ANTENNA
DE2543973A1 (en) * 1974-10-04 1976-04-08 Philippe Roger Rene Laurent RADIO AERIAL
US4089817A (en) * 1976-10-12 1978-05-16 Stephen A. Denmar Antenna system
US4238799A (en) * 1978-03-27 1980-12-09 Avanti Research & Development, Inc. Windshield mounted half-wave communications antenna assembly
US4266227A (en) * 1979-08-20 1981-05-05 Avanti Research & Development, Inc. Mounting for mobile communications antenna

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3823402A (en) * 1972-12-12 1974-07-09 Westinghouse Electric Corp Antenna deployed from aircraft to contact a body of water for length reduction
JPS55102206U (en) * 1979-01-09 1980-07-16
JPS6036889Y2 (en) * 1979-03-28 1985-11-01 株式会社ヨコオ antenna device

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2130888A1 (en) * 1970-07-17 1972-01-20 Philips Nv Coaxial antenna junction box
DE2257352A1 (en) * 1972-11-22 1974-05-30 Kathrein Werke Kg VEHICLE ANTENNA
DE2543973A1 (en) * 1974-10-04 1976-04-08 Philippe Roger Rene Laurent RADIO AERIAL
US4089817A (en) * 1976-10-12 1978-05-16 Stephen A. Denmar Antenna system
US4238799A (en) * 1978-03-27 1980-12-09 Avanti Research & Development, Inc. Windshield mounted half-wave communications antenna assembly
US4266227A (en) * 1979-08-20 1981-05-05 Avanti Research & Development, Inc. Mounting for mobile communications antenna

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU577539B2 (en) * 1983-09-23 1988-09-29 Allen Telecom Inc. Mobile communications antenna
USRE33743E (en) * 1985-03-06 1991-11-12 On-glass antenna
US4658259A (en) * 1985-03-06 1987-04-14 Blaese Herbert R On-glass antenna
US4794319A (en) * 1986-07-03 1988-12-27 Alliance Research Corporation Glass mounted antenna
EP0279117A1 (en) * 1987-01-22 1988-08-24 Herbert Rudolph Blaese Modified on-glass antenna
US4779098A (en) * 1987-01-22 1988-10-18 Blaese Herbert R Modified on-glass antenna with decoupling members
US4785305A (en) * 1987-04-20 1988-11-15 Don Shyu Glass-mountable antenna assembly with microstrip filter
US4825217A (en) * 1987-10-19 1989-04-25 Tae Lim Electronics Co., Ltd. Car phone antenna assembly
GB2218852A (en) * 1988-05-16 1989-11-22 Antenna Co Antenna for a cellular mobile telephone
US4931806A (en) * 1988-05-16 1990-06-05 The Antenna Company Window mounted antenna for a cellular mobile telephone
US4931805A (en) * 1988-05-16 1990-06-05 The Antenna Company Adhesive system and method for mounting a cellular telephone antenna
US4857939A (en) * 1988-06-03 1989-08-15 Alliance Research Corporation Mobile communications antenna
EP0348054A2 (en) * 1988-06-03 1989-12-27 Alliance Research Corporation Mobile communications antenna
EP0348054A3 (en) * 1988-06-03 1990-08-08 Alliance Research Corporation Mobile communications antenna
EP0358529A1 (en) * 1988-09-09 1990-03-14 Bantex Limited Antenna for mounting on a non-conductive surface, such as a window of a vehicle
WO1990003048A1 (en) * 1988-09-09 1990-03-22 Bantex Limited Antenna for mounting on a non-conductive surface, such as a window of a vehicle
US4992800A (en) * 1989-01-23 1991-02-12 Martino Research & Development Co. Windshield mounted antenna assembly
WO1990011627A1 (en) * 1989-03-17 1990-10-04 Allgon Ab Mobile communications antenna
US4916456A (en) * 1989-05-12 1990-04-10 Don Shyu Glass-mountable antenna assembly
US5262795A (en) * 1990-01-30 1993-11-16 Cellular Ic, Inc. Unitary cellular antenna system
GB2245430A (en) * 1990-04-09 1992-01-02 Panorama Antennas Ltd Matching element for mobile antenna
GB2245430B (en) * 1990-04-09 1994-06-08 Panorama Antennas Ltd Matching element for mobile antenna
GB2250637A (en) * 1990-12-05 1992-06-10 Leslie James Wallen Isolated antenna bases
US5463405A (en) * 1994-05-20 1995-10-31 Valor Enterprises, Inc. Cellular telephone coupling network
WO1997028575A1 (en) * 1996-01-30 1997-08-07 Heed Bjoern Antenna
US6191745B1 (en) 1996-01-30 2001-02-20 Heed Bjoern Antenna

Also Published As

Publication number Publication date
NZ209019A (en) 1988-04-29
ATE88837T1 (en) 1993-05-15
AU3192484A (en) 1985-03-28
JPS6077501A (en) 1985-05-02
EP0137391B1 (en) 1993-04-28
AU577539B2 (en) 1988-09-29
ZA845849B (en) 1985-03-27
DE3486135D1 (en) 1993-06-03
DE3486135T2 (en) 1993-09-16
JPH0374846B2 (en) 1991-11-28
CA1223339A (en) 1987-06-23

Similar Documents

Publication Publication Date Title
US4839660A (en) Cellular mobile communication antenna
EP0137391B1 (en) Cellular mobile communications antenna
US4835541A (en) Near-isotropic low-profile microstrip radiator especially suited for use as a mobile vehicle antenna
KR100724300B1 (en) Half-loop antenna
US5343214A (en) Cellular mobile communications antenna
US5451966A (en) Ultra-high frequency, slot coupled, low-cost antenna system
EP0332139B1 (en) Wide band antenna for mobile communications
US5706015A (en) Flat-top antenna apparatus including at least one mobile radio antenna and a GPS antenna
US5402134A (en) Flat plate antenna module
US5363114A (en) Planar serpentine antennas
KR920002895B1 (en) Mobile communications antenna
US5283589A (en) Window mountable UHF mobile antenna system
US4658259A (en) On-glass antenna
US6538604B1 (en) Planar antenna
US6853341B1 (en) Antenna means
CN109473787A (en) A kind of shark fins antenna module
USRE33743E (en) On-glass antenna
US5650791A (en) Multiband antenna for automotive vehicle
US6292150B1 (en) Glass antenna device
US20060176227A1 (en) Antenna for vehicle
JP3181075B2 (en) Mobile antenna
EP4262022A1 (en) Antenna device
US4124851A (en) UHF antenna with air dielectric feed means
WO1999035709A1 (en) Antenna device mainly for use in a vehicle
CN217427092U (en) Antenna coupling electric conductor and radio frequency device

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

17P Request for examination filed

Effective date: 19851016

17Q First examination report despatched

Effective date: 19870507

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Effective date: 19930428

REF Corresponds to:

Ref document number: 88837

Country of ref document: AT

Date of ref document: 19930515

Kind code of ref document: T

REF Corresponds to:

Ref document number: 3486135

Country of ref document: DE

Date of ref document: 19930603

ITF It: translation for a ep patent filed
ET Fr: translation filed
REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19930930

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ALLEN TELECOM GROUP, INC.

REG Reference to a national code

Ref country code: CH

Ref legal event code: PUE

Owner name: ALLEN TELECOM GROUP, INC.

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: ALLEN TELECOM GROUP, INC. TE CLEVELAND, OHIO, VER.

26N No opposition filed
REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

NLS Nl: assignments of ep-patents

Owner name: ALLEN TELECOM GROUP, INC. TE CLEVELAND, OHIO, VER.

EAL Se: european patent in force in sweden

Ref document number: 84111340.0

NLS Nl: assignments of ep-patents

Owner name: ALLEN TELECOM, INC

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

REG Reference to a national code

Ref country code: CH

Ref legal event code: PFA

Free format text: ALLEN TELECOM GROUP, INC. TRANSFER- THE ALLEN GROUP, INC. * THE ALLEN GROUP, INC. TRANSFER- ALLEN TELECOM, INC

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20030902

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20030909

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20030917

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030918

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20030919

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20030923

Year of fee payment: 20

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20031031

Year of fee payment: 20

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040920

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040920

Ref country code: CH

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040920

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040921

Ref country code: AT

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20040921

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

EUG Se: european patent has lapsed
NLV7 Nl: ceased due to reaching the maximum lifetime of a patent

Effective date: 20040921