Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q15/00—Devices for reflection, refraction, diffraction or polarisation of waves radiated from an antenna, e.g. quasi-optical devices
  • H01Q15/02—Refracting or diffracting devices, e.g. lens, prism
  • H01Q15/08—Refracting or diffracting devices, e.g. lens, prism formed of solid dielectric material
• • 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
  • H01Q13/106—Microstrip slot antennas
• • 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
  • H01Q19/09—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 wherein the primary active element is coated with or embedded in a dielectric or magnetic material
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q21/00—Antenna arrays or systems
  • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
  • H01Q21/061—Two dimensional planar arrays
  • H01Q21/065—Patch antenna array
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01Q—ANTENNAS, i.e. RADIO AERIALS
  • H01Q21/00—Antenna arrays or systems
  • H01Q21/06—Arrays of individually energised antenna units similarly polarised and spaced apart
  • H01Q21/08—Arrays of individually energised antenna units similarly polarised and spaced apart the units being spaced along or adjacent to a rectilinear path

Definitions

• Fig. 8 illustrates an exemplary characteristic of a microstrip antenna known from the prior art and falling into series of types HPBW 60°. As shown, effective HPBW value for such an antenna amounts about 63 degrees.
• the thickness of said lateral dielectric patch varies in a stepped or continuous manner in a direction perpendicular to the longitudinal axis of said radiating structure.
• Fig. 1 presents first embodiment of a microstrip antenna 1 according to the present invention.
• the main radiating arrangement of the antenna 1 comprises a conductive microstrip structure 2 placed on a rectangular dielectric plate 3 made of epoxy-glass laminate, underneath of which a rectangular metal grounded plate 4 parallel to the microstrip structure 2 is disposed.
• the dielectric plate 3 may be an epoxy-glass laminate such as for example laminate FR4 featuring dielectric loss angle ⁇ of 0.02 and dielectric constant ⁇ ⁇ of 4.3 provided by Isola GmbH, teflon-ceramic laminate such as produced by Rogers Corporation, or any other material having properties suitable for a given operational range of an antenna.
• the dielectric plate 3 on which the microstrip structure 2 is etched is obviously only the support element for the structure 2.
• the microstrip structure 2 may also be created by cutting it out from a cooper-metal sheet and may constitute a self- supporting element.
• the grounded plate 4 is separated from the microstrip structure 2 by means of the first dielectric layer 7 having thickness d and comprising an air layer and dielectric plate layer 3.
• a socket 8 and a metal pin 9 are fastened to the conductive microstrip structure 2 wherein the pin 9 galvanically connects the structure 2 with the grounded plate 4.
• a feed cable (not shown) for connecting the antenna with sending/receiving devices may be connected to the socket 8.
• Fig. 2 shows the second preferred embodiment of an antenna according to the present invention, similar to the embodiment of Fig. 1 but with the additional second solid dielectric layer comprised of two lateral dielectric patches 13 of identical width S arranged coplanarly on both sides of the longitudinal open gap 12 extending over the whole microstrip structure 2. Thanks to that the additional solid dielectric layer overlaps neither the radiating elements 5 nor the conductive paths of the structure 2.
• the inner edges of the lateral patches 13 are located above the outer longitudinal edges of a rectangular outline of the microstrip structure 2 wherein the lateral patches 13 are arranged symmetrically with regard to the central axis 14 of the microstrip structure 2. Underneath the surface of the first dielectric layer 3 and the second solid dielectric layer 10 the conductive metal grounded plate 4 is disposed.
• Fig. 3 presents the third embodiment of an antenna according to the present invention having an asymmetrical microstrip structure 2 comprising a symmetric row of rhomboidal radiating elements 5 connected by feed paths 6 arranged asymmetrically relative to the row
• Fig. 9 shows a fragment of a power directional characteristic for the antenna according to the present invention in a plane perpendicular to the longitudinal axis of the microstrip structure.
• the Y axis corresponds to the values of electromagnetic field intensity of the antenna radiation while the X axis corresponds to the values of the angle (theta) between the point of maximal value of electromagnetic field intensity.
• the characteristic has been determined the antenna of construction demonstrated on Fig. 2 having the following constructional parameters: the height H between the second dielectric layer and the microstrip structure amounts 15 mm, the width S of the dielectric patch amounts 34 mm, the thickness G of the patch amounts 1 mm, the width A of the gap between the patches amounts 26 mm, dielectric constant ⁇ , of the second solid dielectric layer material amounts 7.5.
• the antenna provided with the additional second solid dielectric layer according to the present invention features HPBW value of 105 degrees.
• the influence of the additional second dielectric layer on the width of the main radiation lobe of an antenna is clearly visible and results in substantial increase of the HPBW value of 42°.
• the additional height of placing of the opposite lateral dielectric patches and/or the distance froni the microstrip structure and/or the inclination angle and/or the thickness of the opposite lateral dielectric patches.

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• Waveguide Aerials (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=43304012

Family Applications (1)

Country Status (2)

Cited By (4)

Citations (2)

• 2009
  • 2009-09-14 PL PL389027A patent/PL218960B1/pl unknown
• 2010
  • 2010-09-14 WO PCT/PL2010/000087 patent/WO2011031174A1/en active Application Filing

Patent Citations (3)

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