EP0427131A2 - Antenne de radar directive avec focalisation de l'énergie électromagnétique, pour télécommunications - Google Patents

Antenne de radar directive avec focalisation de l'énergie électromagnétique, pour télécommunications Download PDF

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Publication number
EP0427131A2
EP0427131A2 EP90121021A EP90121021A EP0427131A2 EP 0427131 A2 EP0427131 A2 EP 0427131A2 EP 90121021 A EP90121021 A EP 90121021A EP 90121021 A EP90121021 A EP 90121021A EP 0427131 A2 EP0427131 A2 EP 0427131A2
Authority
EP
European Patent Office
Prior art keywords
radar antenna
electromagnetic energy
antenna according
cavity
frequency
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Withdrawn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
EP90121021A
Other languages
German (de)
English (en)
Other versions
EP0427131A3 (en
Inventor
Franco Baldi
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.)
Ieg Industrie Elettroniche Guglionesi Srl
Original Assignee
Ieg Industrie Elettroniche Guglionesi Srl
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 Ieg Industrie Elettroniche Guglionesi Srl filed Critical Ieg Industrie Elettroniche Guglionesi Srl
Publication of EP0427131A2 publication Critical patent/EP0427131A2/fr
Publication of EP0427131A3 publication Critical patent/EP0427131A3/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q19/00—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic
    • H01Q19/06—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens
    • H01Q19/062—Combinations of primary active antenna elements and units with secondary devices, e.g. with quasi-optical devices, for giving the antenna a desired directional characteristic using refracting or diffracting devices, e.g. lens for focusing
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q1/00—Details of, or arrangements associated with, antennas
    • H01Q1/12—Supports; Mounting means
    • H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
    • H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
    • H01Q1/247—Supports; Mounting means by structural association with other equipment or articles with receiving set with frequency mixer, e.g. for direct satellite reception or Doppler radar
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q13/00—Waveguide horns or mouths; Slot antennas; Leaky-waveguide antennas; Equivalent structures causing radiation along the transmission path of a guided wave
    • H01Q13/10—Resonant slot antennas
    • H01Q13/18—Resonant slot antennas the slot being backed by, or formed in boundary wall of, a resonant cavity ; Open cavity antennas

Definitions

  • the present invention relates to an innovative directive radar antenna for telecommunications, with electromagnetic energy compression, characterized by high directionality and gain with respect to other systems, while having very small dimensions.
  • the aim of the present invention is to overcome the above mentioned drawbacks by providing a directive radar antenna of high directivity, gain and power efficiency and a very small size and weight construction.
  • a main object of the present invention is to provide such a radar antenna which can be easily and simply fitted for transmitting a light radiation.
  • the antenna according to the invention comprises a front lenticular body made of plastics including a plurality of electromagnetic cavities, in which the electromagnetic energy self-charges.
  • the bottom of the antenna passive cavity which is frontally closed by the lenticular body made of plastics, is defined by a metallic plate provided with a hole or a central opening from which energy is irradiated and self-­accumulates by successive feedbacks in the lenticular body of the antenna.
  • the pyramid-like shape with cambered walls of the front lenticular body in which the compression of the electromagnetic energy occurs and which provides an output power of high directionality, can have any spatial configuration, for example an ogive-like shape having a circular base, or a pyramid-like shape having a square or generally polygonal base; more generally, it can be defined as a pyramidal shape or spherical profile and can be defined by the rotation of an arc of circumference.
  • the possibility of positioning a laser source at the center of the antenna allows moreover to convert said antenna into a highly directive source of luminous power and therefore to use the antenna as a luminous power source for different technological purposes or for other applications.
  • the antenna 10 comprises a main cavity 11 constituted by a metallic box-like body defining a sort of rectangular wave guide, also termed hereinafter “active cavity”, which is associated with a secondary cavity 12, also termed “energy reflection cavity” or “passive cavity”, frontally closed by a lenticular body 13, made of a plastic material or another suitable material, having a wedge-shaped configuration and a particular arrangement.
  • active cavity a sort of rectangular wave guide
  • secondary cavity 12 also termed “energy reflection cavity” or “passive cavity”
  • lenticular body 13 made of a plastic material or another suitable material, having a wedge-shaped configuration and a particular arrangement.
  • the active cavity 11, in which the electromagnetic energy is generated, is connected to the secondary cavity 12 through a central passage 14 defined by appropriate holes or superimposed openings in the back wall which delimits the secondary cavity 12 and in the upper wall of the wave guide
  • a cylindrical body 15 axially adjustable in its position for example by screwing it into two threaded lateral blocks 16, as schematically illustrated, for the adjustment of the operating frequency of the antenna.
  • a transmitter diode or gun diode 17 and respectively a receiver or detector 18 provided with respective frequency adjustment screws 19 and extending into the cavity 11.
  • the distance of the adjustment screws 19 and 20 from the end walls of the cavity 11 and respectively from the transmitter diode and from the detector diode 17, 18 is one quarter of the wavelength of the generated or received frequency, whereas the distance of the transmitter diode and of the receiver 18 is half the wavelength of the chosen operating frequency.
  • the secondary cavity 12 is connected to the main cavity or active cavity 11 through the central passage 14, and is defined by a flat element or by a planar back wall conveniently spaced by means of lateral walls from the lenticular front closing body 13.
  • the lenticular body 13 has a specifically designed shape which is adapted for allowing the self-compression of the electromagnetic energy and a highly directive output thereof at the front apex.
  • Said body is therefore characterized by lateral walls 13a which have a cambered shape or are delimited by portions of spherical surfaces, as schematically illustrated, or by an ogive-like or pyramid-like shape, the base whereof, as shown in figures 3 and 4 merely by way of example, can be circular, square or polygonal depending on the requirements.
  • figure 3 illustrates a pyramid-like shape with a circular base with a spherical profile
  • figure 4 illustrates a pyramid-like shape with a square base and with cambered surfaces only on two sides.
  • the particular combination and configuration of the two cavities 11 and 12 and of the front lenticular body 13 provide the disclosed radar antenna with a high gain and directionality, as well a high output power efficiency, while keeping the dimensions of the antenna to a minimum.
  • the centralized output of the energy at the apex of the lenticular body furthermore allows to use the radar antenna according to the present invention as a luminous energy source, for example by replacing the central cylindrical body 15 of the active or main chamber with a suitable laser source.
  • the operation of the antenna according to the present invention is characterized by a series of internal reflections, in the cavities and in the front lenticular body, of the electromagnetic energy, which self-charges or accumulates and compresses and is conveyed toward the apex from which it is irradiated in a highly directive manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Burglar Alarm Systems (AREA)
  • Radar Systems Or Details Thereof (AREA)
  • Aerials With Secondary Devices (AREA)
EP19900121021 1989-11-07 1990-11-02 Directive radar antenna with electromagnetic energy compression, for telecommunications Withdrawn EP0427131A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT02229289A IT1236669B (it) 1989-11-07 1989-11-07 Antenna radar direttiva, a compressione di energia elettromagnetica, per telecomunicazione
IT2229289 1989-11-07

Publications (2)

Publication Number Publication Date
EP0427131A2 true EP0427131A2 (fr) 1991-05-15
EP0427131A3 EP0427131A3 (en) 1991-10-16

Family

ID=11194272

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900121021 Withdrawn EP0427131A3 (en) 1989-11-07 1990-11-02 Directive radar antenna with electromagnetic energy compression, for telecommunications

Country Status (2)

Country Link
EP (1) EP0427131A3 (fr)
IT (1) IT1236669B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636899A3 (fr) * 1993-07-31 1997-08-13 Plessey Semiconductors Ltd Senseur doppler à micro-ondes.
RU2189677C2 (ru) * 2000-12-19 2002-09-20 16 Центральный научно-исследовательский испытательный институт МО РФ Кольцевая щелевая антенна
US7548190B2 (en) * 2006-12-15 2009-06-16 Franco Baldi Obstacle sensor operating by collimation and focusing of the emitted wave
EP2571064A1 (fr) 2011-09-13 2013-03-20 Multi.Bay SA Concentrateur solaire hybride comprenant des moyens de concentration, un dispositif photovoltaïque et un dispositif thermique pour la génération d'électricité

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2895127A (en) * 1954-07-20 1959-07-14 Rca Corp Directive diplex antenna
GB1573300A (en) * 1977-03-09 1980-08-20 Aei Semiconductors Ltd Microwave oscillators
US4187507A (en) * 1978-10-13 1980-02-05 Sperry Rand Corporation Multiple beam antenna array
FR2448230A1 (fr) * 1979-02-02 1980-08-29 Thomson Csf Source rayonnante a cavite ouverte excitee par un dipole

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0636899A3 (fr) * 1993-07-31 1997-08-13 Plessey Semiconductors Ltd Senseur doppler à micro-ondes.
RU2189677C2 (ru) * 2000-12-19 2002-09-20 16 Центральный научно-исследовательский испытательный институт МО РФ Кольцевая щелевая антенна
US7548190B2 (en) * 2006-12-15 2009-06-16 Franco Baldi Obstacle sensor operating by collimation and focusing of the emitted wave
EP2571064A1 (fr) 2011-09-13 2013-03-20 Multi.Bay SA Concentrateur solaire hybride comprenant des moyens de concentration, un dispositif photovoltaïque et un dispositif thermique pour la génération d'électricité

Also Published As

Publication number Publication date
IT1236669B (it) 1993-03-25
IT8922292A0 (it) 1989-11-07
IT8922292A1 (it) 1991-05-07
EP0427131A3 (en) 1991-10-16

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