WO2003012916A1 - Diviseur de puissance pour une antenne - Google Patents

Diviseur de puissance pour une antenne Download PDF

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Publication number
WO2003012916A1
WO2003012916A1 PCT/GB2002/003498 GB0203498W WO03012916A1 WO 2003012916 A1 WO2003012916 A1 WO 2003012916A1 GB 0203498 W GB0203498 W GB 0203498W WO 03012916 A1 WO03012916 A1 WO 03012916A1
Authority
WO
WIPO (PCT)
Prior art keywords
power divider
waveguide
waveguides
antenna power
antenna
Prior art date
Application number
PCT/GB2002/003498
Other languages
English (en)
Inventor
John Cooper
Barry George Morton Helme
Original Assignee
Quasar Microwave Technology Limited
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
Application filed by Quasar Microwave Technology Limited filed Critical Quasar Microwave Technology Limited
Priority to GB0402286A priority Critical patent/GB2396259B/en
Publication of WO2003012916A1 publication Critical patent/WO2003012916A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
    • H01P5/00—Coupling devices of the waveguide type
    • H01P5/12—Coupling devices having more than two ports
    • H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
    • H01P5/18—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers
    • H01P5/181—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being hollow waveguides
    • H01P5/182—Conjugate devices, i.e. devices having at least one port decoupled from one other port consisting of two coupled guides, e.g. directional couplers the guides being hollow waveguides the waveguides being arranged in parallel

Definitions

  • This invention relates to a power divider for use with microwave antennas.
  • Microwave antennas for use in communication installations may be mounted on a mast or in another situation remote from a radio. They are often provided with a waveguide coupler through which power can be fed to or from the antenna via a suitable wav.eguide. In some situations however, it is more convenient to feed power to or from the antenna through a transmission line of the kind in which the signals pass along electrical conductors, e.g. co-axial transmission line. Moreover, some installations have a single antenna connected to more than one remote radio, involving the use of suitable power dividers. In all cases it is important that the system should have good electrical performance. At present such an arrangement requires a heavy, bulky and mechanically complex coupling arrangement which often takes up valuable space on the communications mast and adds to the mast loading. Furthermore, the complexity of the arrangement increases the risk of reduced electrical performance due to bad design or workmanship or through the development of mechanical problems.
  • the present invention seeks to provide a new and inventive means of coupling such an antenna to two remote radios via transmission line using a compact and lightweight arrangement which ensures good electrical performance and mechanical reliability and avoids the need for a flexible waveguide connection to the antenna.
  • the present invention proposes an antenna power divider having a body provided with:
  • - window means through which a proportion of the microwave energy may pass between the first and second waveguides within the body
  • the power divider may thus be mounted directly on the microwave antenna with the coupling means engaged with a complimentary connector on the antenna.
  • the two transmission lines are then coupled to the power divider, leading to the respective radios.
  • the body is preferably of a substantially planar configuration, and preferably includes a plurality of opposed metal plates.
  • the two waveguides are preferably formed in a first plate which is relatively thick with a thinner plate superimposed thereon.
  • the window means can be an aperture formed in a wall separating the two waveguides.
  • the window means could, by way of example, take the form of a single opening or, a single slot or multiple slots depending on the coupling value and particular performance requirements.
  • the window means could also be provided by a separate apertured component, e.g. a shim, which separates the two waveguides allowing the appropriate microwave coupling between them.
  • the end of the second waveguide which is remote from the second connector preferably contains a microwave termination element.
  • a termination element may contain a particulate microwave-absorbing material, e.g. iron particles, in a microwave-transparent matrix, e.g. epoxy or a ceramic microwave absorbing material.
  • Figure 1 is a side view of a power divider in accordance with the invention for use with a microwave antenna
  • Figure 2 is an exploded view of the power divider viewed from above but with the cover plate still in place;
  • Figure 3 is a general view of the power divider shown with the cover plate removed.
  • the antenna power divider includes a body 1 formed by relatively thick base plate 2 and a cover plate 3 of substantially identical outline which are secured together, e.g. by brazing and located by dowels 4.
  • the body 1 is generally rectangular with a parallel-sided mid region 5 and a somewhat wider parallel-sided bottom region 6 separated by inclined shoulders 7 and 8.
  • a top region 9 has a similar outwardly-inclined shoulder 10 which leads via a short vertical face 11 to an angularly-disposed corner opening 12 provided with cover 13.
  • the upper face 14 of the body 1 extends beyond the bottom region 6 to form a parallel-sided projection 15.
  • the lower face of the projection travels in a smooth curve 16 forming a notch 17 at the upper end of the mid region 5, which is filled by a strengthening fillet 18.
  • the outer end of the projection 15 is provided with a perpendicular coupling flange 19 which, with an intervening sealing gasket 20 as shown in Fig. 2, may be used to mount the power divider on the output connector of a known microwave antenna (not shown).
  • the base plate 3 is machined to form first and second waveguides 22 and 23 which, when the cover plate 2 is in place, are of rectangular section.
  • the first waveguide enters through the coupling flange 19 and travels within the projection 15 before curving round to travel downwards within the mid region 5.
  • the second waveguide 23 leads from the top opening 12 and curves downwards to travel parallel to the first waveguide.
  • a single window opening 24 is formed between the two waveguides 22 and 23 to permit microwave energy to pass between the waveguides.
  • the opposed walls of the two waveguides on opposite sides of the window opening are provided with shallow notches 25 and 26 which may encourage a controlled proportion of the microwave energy to pass from one waveguide to the other.
  • the two waveguides diverge before continuing downwards towards their closed lower ends.
  • the cover plate 3 has a pair of transmission line connectors 30 and 31 which in this example are intended for connection with transmission lines of the kind which include a pair of co-axial conductors separated by a low-loss dielectric material.
  • the connectors electrically interface with the respective waveguides through suitable coupling elements of known form.
  • a protective cap 33 is provided for temporary or permanent termination of the two connectors 30 and 31.
  • a storage mechanism 34 is provided for the cap when both transmission lines are in use.
  • the antenna will thus be split by the waveguides 22 and 23 within the power divider to appear equally at the co-axial connectors 30 and 31.
  • the upper end of the second waveguide 23 contains a microwave termination device 36, inserted through the opening 12, minimises return losses at all three ports by absorbing reflected signals.
  • the termination device may be of known form, e.g. an epoxy matrix loaded with iron particles or a ceramic microwave absorber material. It will be appreciated that the antenna can also be used for transmission since radio signals appearing at either of the connectors 30 or 31 will be launched into the respective waveguide to travel to the antenna.
  • the embodiment described above provides a compact and convenient way of connecting the transmission lines to the antenna it would also be possible for one or both of the connectors 30 and 31 to be situated on the rear face D (Fig. 2), on either of the side faces B or C, or on the bottom face A. Furthermore, the coupling flange 19 for connection to the antenna could be situated on the opposite side face C, the front or rear faces E or D, or on the top face F.
  • the connectors 30 and 31 may be of various kinds, and they may both be the same or different, e.g. male or female (plug or socket type), straight or right-angle, SMA or N-type etc.

Landscapes

  • Waveguide Aerials (AREA)
  • Details Of Aerials (AREA)

Abstract

Un diviseur de puissance pour une antenne comprend un corps (1) globalement rectangulaire doté d'une partie saillante latérale (15) comportant une bride (19) de couplage prévue pour se fixer sur une antenne. Le corps comprend une plaque de base (3) relativement épaisse sur laquelle se superpose une plaque formant couvercle (2). Un premier guide d'ondes (22) est formé dans la plaque de base (3) entre un premier connecteur (30) de ligne de transmission et le corps qu'il quitte par la bride (19) de couplage et un deuxième guide d'ondes (23) s'étend le long du premier guide d'ondes entre un deuxième connecteur (31) de ligne de transmission et un élément de terminaison hyperfréquence situé dans une ouverture (12) de coin. Une fenêtre d'ouverture (24) est formée dans la plaque de base entre les deux guides d'ondes de telle sorte qu'une partie de l'énergie hyperfréquence puisse passer entre les premier et deuxième guides d'ondes.
PCT/GB2002/003498 2001-07-31 2002-07-30 Diviseur de puissance pour une antenne WO2003012916A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0402286A GB2396259B (en) 2001-07-31 2002-07-30 Antenna power divider

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0118608A GB0118608D0 (en) 2001-07-31 2001-07-31 Antenna power divider
GB0118608.9 2001-07-31

Publications (1)

Publication Number Publication Date
WO2003012916A1 true WO2003012916A1 (fr) 2003-02-13

Family

ID=9919505

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/003498 WO2003012916A1 (fr) 2001-07-31 2002-07-30 Diviseur de puissance pour une antenne

Country Status (2)

Country Link
GB (2) GB0118608D0 (fr)
WO (1) WO2003012916A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009116473A1 (fr) * 2008-03-17 2009-09-24 日本電気株式会社 Coupleur de guide d'ondes
US8244287B2 (en) 2009-10-29 2012-08-14 Z-Communications, Inc. Radio and antenna system and dual-mode microwave coupler
CN105680142A (zh) * 2016-03-31 2016-06-15 中国电子科技集团公司第二十七研究所 一种微波高功率分配/合成器

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1115719A (fr) * 1953-11-10 1956-04-27 Airtron Raccordements pour guide d'ondes
US3899756A (en) * 1973-05-05 1975-08-12 Marconi Co Ltd Microwave phase correcting network utilizing waveguide coupler having mismatched ports caused by laterally displaced end section
US3999151A (en) * 1975-09-08 1976-12-21 Western Electric Company, Inc. Crossguide hybrid coupler and a commutating hybrid using same to form a channel branching network
US4691177A (en) * 1985-10-02 1987-09-01 Hughes Aircraft Company Waveguide switch with variable short wall coupling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0106834D0 (en) * 2001-03-20 2001-05-09 Quasar Microwave Tech microwave coupler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1115719A (fr) * 1953-11-10 1956-04-27 Airtron Raccordements pour guide d'ondes
US3899756A (en) * 1973-05-05 1975-08-12 Marconi Co Ltd Microwave phase correcting network utilizing waveguide coupler having mismatched ports caused by laterally displaced end section
US3999151A (en) * 1975-09-08 1976-12-21 Western Electric Company, Inc. Crossguide hybrid coupler and a commutating hybrid using same to form a channel branching network
US4691177A (en) * 1985-10-02 1987-09-01 Hughes Aircraft Company Waveguide switch with variable short wall coupling

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009116473A1 (fr) * 2008-03-17 2009-09-24 日本電気株式会社 Coupleur de guide d'ondes
US8244287B2 (en) 2009-10-29 2012-08-14 Z-Communications, Inc. Radio and antenna system and dual-mode microwave coupler
CN105680142A (zh) * 2016-03-31 2016-06-15 中国电子科技集团公司第二十七研究所 一种微波高功率分配/合成器
CN105680142B (zh) * 2016-03-31 2018-06-08 中国电子科技集团公司第二十七研究所 一种微波高功率分配/合成器

Also Published As

Publication number Publication date
GB2396259B (en) 2005-03-30
GB0118608D0 (en) 2001-09-19
GB2396259A (en) 2004-06-16
GB0402286D0 (en) 2004-03-10

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