EP0521326A2 - Dispositif pour améliorer l'efficacité d'un système rayonnant par éléments parasites dans le plan de masse - Google Patents

Dispositif pour améliorer l'efficacité d'un système rayonnant par éléments parasites dans le plan de masse Download PDF

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Publication number
EP0521326A2
EP0521326A2 EP92109983A EP92109983A EP0521326A2 EP 0521326 A2 EP0521326 A2 EP 0521326A2 EP 92109983 A EP92109983 A EP 92109983A EP 92109983 A EP92109983 A EP 92109983A EP 0521326 A2 EP0521326 A2 EP 0521326A2
Authority
EP
European Patent Office
Prior art keywords
radiating system
efficiency
radiating
antennae
elements
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.)
Withdrawn
Application number
EP92109983A
Other languages
German (de)
English (en)
Other versions
EP0521326A3 (en
Inventor
Francesco Saverio Lomaglio
Giancarlo Ascione
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.)
Leonardo SpA
Original Assignee
Alenia Aeritalia e Selenia SpA
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 Alenia Aeritalia e Selenia SpA filed Critical Alenia Aeritalia e Selenia SpA
Publication of EP0521326A2 publication Critical patent/EP0521326A2/fr
Publication of EP0521326A3 publication Critical patent/EP0521326A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H01Q21/293—Combinations of different interacting antenna units for giving a desired directional characteristic one unit or more being an array of identical aerial elements

Definitions

  • the invention regards a device to be inserted into an antenna feed, capable of improving the efficiency of the radiating system, and which is particularly suitable to achieve control on the radiating pattern of the entire system, according to its eventual application. This is possible through the device described here, as once it is supplied directly by an RF source it excites a passive radiating element, i.e. not fed directly, consisting of a half-wavelength slot set on the same ground plane as the dipole.
  • the invention belongs to the technical field of antennae, and more precisely to microwave antennae, and it may be adopted in stand alone or integrated configurations for reflector antennae for air traffic control, where detection is required to be in the S band associated with an interrogation which has to be in the L band.
  • Such interrogation can be obtained by inserting the innovative device into a possibly pre-existing illuminator which can control the radiating pattern of the entire radiating system or antenna.
  • the device exploits the parasite effect of radiating elements, which are electromagnetically complementary to active elements connected to a feed network.
  • radiating elements which are electromagnetically complementary to active elements connected to a feed network.
  • electrical dipoles as active elements
  • magnetic dipoles as passive elements, consisting of slots in the ground plane.
  • the advantage obtained with this invention is that of securing the same radiating effectiveness of a radiating system of four elements fed through a suitable feed line, yet having less electrical losses due to the adoption of a simplified feed line, as it serves only the active elements of this configuration.
  • FIG. 1 is a schematic diagram of the radiating system. It shows:
  • the radiating system shown in figure 3, adopts the half-wavelength dipole as radiating element, obtained coaxially or by etching process on the ground plane.
  • a passive radiating element by passive we intend an element which is not fed directly
  • the slot has to be correctly positioned and oriented with respect to the active radiating element, according to the excitation required of the entire radiating system.
  • the illustration of the principle of operation of the device can be made by thinking of the radiating system as two radiating elements and two passive elements set on the same ground plane as shown in figure 2.
  • the system shown in figure 1 may be schematically thought of as two radiating active elements with a unit excitation, where parameter K is equal to 1, of their image with respect to the ground plane, also with unit excitation,, and of two parasite radiating elements, with excitation lower than that of the active elements (K ⁇ 1) as a function of their position.
  • Figure 2 shows the electrical schematic described and the global excitation function of the equivalent radiating system.
  • the latter has a radiating effectiveness equivalent to that of a four element radiating system, but with lower electrical losses due to the adoption of a simplified electrical feed, which is limited to two central active elements in the system.
  • the array radiating pattern due to the active dipoles, is controlled through the electromagnetic or air coupling between them and the slots set in the dipole ground plane.
  • the slots behave as equivalent radiating elements with phase and intensity excitation levels determined by the coupling, which is a function of the dimensions and relative position of the slots with respect to the active elements.
  • the simple variation of the geometric parameters and number of the slots provides a function to excite the radiating system, which for the same number of radiating elements, is obtained with a substantially simplified feed network, of easy electric and mechanic integration in antennae for surveillance radars which also require an interrogation function.
  • the invention of this radiating system has an application to a reflector type antenna operating in the S band which also requires an L band interrogation function, which is obtained by integrating the new radiating system into the existing illuminator by means of an additional retrofit kit.

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  • Variable-Direction Aerials And Aerial Arrays (AREA)
  • Aerials With Secondary Devices (AREA)
  • Medicines That Contain Protein Lipid Enzymes And Other Medicines (AREA)
EP19920109983 1991-06-14 1992-06-13 Device which improves the efficiency of a radiating system by means of parasite elements set on the ground plane Withdrawn EP0521326A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITRM910429 1991-06-14
ITRM910429A IT1246619B (it) 1991-06-14 1991-06-14 Dispositivo atto a migliorare l'efficienza di un sistema radiativo per mezzo di elementi parassiti ricavati sul piano di massa

Publications (2)

Publication Number Publication Date
EP0521326A2 true EP0521326A2 (fr) 1993-01-07
EP0521326A3 EP0521326A3 (en) 1993-03-17

Family

ID=11400203

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920109983 Withdrawn EP0521326A3 (en) 1991-06-14 1992-06-13 Device which improves the efficiency of a radiating system by means of parasite elements set on the ground plane

Country Status (3)

Country Link
EP (1) EP0521326A3 (fr)
CA (1) CA2071253A1 (fr)
IT (1) IT1246619B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0856909A1 (fr) * 1997-02-04 1998-08-05 Hazeltine Corporation Antennes cellulaires
WO1999060657A1 (fr) * 1998-05-20 1999-11-25 Nortel Matra Cellular Antenne pour station de base de radiocommunication
EP1174946A1 (fr) * 2000-04-25 2002-01-23 Lucent Technologies Inc. Antenne réseau à commande de phase avec des éléments de bord actifs
KR100454102B1 (ko) * 2001-12-20 2004-10-26 주식회사 선우커뮤니케이션 다이폴 안테나 어레이 구조 및 이를 이용한 안테나
WO2008151451A1 (fr) * 2007-06-12 2008-12-18 Huber + Suhner Ag Antenne large bande comprenant des éléments non alimentés

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587524A (en) * 1984-01-09 1986-05-06 Mcdonnell Douglas Corporation Reduced height monopole/slot antenna with offset stripline and capacitively loaded slot
US4710775A (en) * 1985-09-30 1987-12-01 The Boeing Company Parasitically coupled, complementary slot-dipole antenna element
GB2225170A (en) * 1988-11-22 1990-05-23 Marconi Gec Ltd An antenna
WO1990010959A1 (fr) * 1989-03-15 1990-09-20 Neil Henry Hill Antenne combine a reseau dipole et a reseau de fentes

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4587524A (en) * 1984-01-09 1986-05-06 Mcdonnell Douglas Corporation Reduced height monopole/slot antenna with offset stripline and capacitively loaded slot
US4710775A (en) * 1985-09-30 1987-12-01 The Boeing Company Parasitically coupled, complementary slot-dipole antenna element
GB2225170A (en) * 1988-11-22 1990-05-23 Marconi Gec Ltd An antenna
WO1990010959A1 (fr) * 1989-03-15 1990-09-20 Neil Henry Hill Antenne combine a reseau dipole et a reseau de fentes

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0856909A1 (fr) * 1997-02-04 1998-08-05 Hazeltine Corporation Antennes cellulaires
US5872544A (en) * 1997-02-04 1999-02-16 Gec-Marconi Hazeltine Corporation Electronic Systems Division Cellular antennas with improved front-to-back performance
WO1999060657A1 (fr) * 1998-05-20 1999-11-25 Nortel Matra Cellular Antenne pour station de base de radiocommunication
FR2779022A1 (fr) * 1998-05-20 1999-11-26 Nortel Matra Cellular Station de base de radiocommunication
US6501965B1 (en) 1998-05-20 2002-12-31 Nortel Matra Cellular Radio communication base station antenna
EP1174946A1 (fr) * 2000-04-25 2002-01-23 Lucent Technologies Inc. Antenne réseau à commande de phase avec des éléments de bord actifs
US6448937B1 (en) 2000-04-25 2002-09-10 Lucent Technologies Inc. Phased array antenna with active parasitic elements
KR100454102B1 (ko) * 2001-12-20 2004-10-26 주식회사 선우커뮤니케이션 다이폴 안테나 어레이 구조 및 이를 이용한 안테나
WO2008151451A1 (fr) * 2007-06-12 2008-12-18 Huber + Suhner Ag Antenne large bande comprenant des éléments non alimentés

Also Published As

Publication number Publication date
ITRM910429A1 (it) 1992-12-14
CA2071253A1 (fr) 1992-12-15
IT1246619B (it) 1994-11-24
EP0521326A3 (en) 1993-03-17
ITRM910429A0 (it) 1991-06-14

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