US 10,897,084 B2Granted

Feed for dual band antenna

AssigneeMti Wireless Edge, Ltd.

InventorIsrael Saraf

Life of this patent

Estimating the term…

Loading patent…

Abstract

A feed for a dual-band antenna, comprising: a first waveguide for low frequency electromagnetic radiations, a second dielectric waveguide for high frequency electromagnetic radiations, an end connected to a low band port configured to pass said low frequency electromagnetic radiations, and a high band port configured to pass said high frequency electromagnetic radiations, wherein the first waveguide comprises a first longitudinal section and a second longitudinal section, wherein a minimal distance between an internal surface of walls of the first section and an external surface of walls of the second dielectric waveguide is D11 along a lateral direction orthogonal to the longitudinal direction, and wherein a maximal distance between an internal surface of at least one first wall of the second section and an external surface of a wall of the second dielectric waveguide facing said first wall is D12 along said lateral direction, wherein D12<D11.

Claims18

Dependent claims

A feed for a dual-band antenna, comprising

a waveguide structure comprising:
a first waveguide configured to communicate first electromagnetic radiations falling in a first frequency range, wherein the first waveguide extends along a longitudinal direction, and
a second dielectric waveguide located within said first waveguide, said second waveguide being configured to communicate second electromagnetic radiations, said second electromagnetic radiations falling in a second frequency range, wherein the second frequency range is higher than the first frequency range,
said waveguide structure having
a first end whose extremity is configured to pass both first and second electromagnetic radiations,
a second end connected to:
a low band port configured to pass said first electromagnetic radiations, and
a high band port configured to pass said second electromagnetic radiations,
wherein the first waveguide comprises:
a first section extending from said first end along said longitudinal direction, and
a second section extending along said longitudinal direction until said second end,
wherein a minimal distance between an internal surface of walls of the first section of said first waveguide and an external surface of walls of the second dielectric waveguide is D11 along a lateral direction orthogonal to said longitudinal direction, and
wherein a maximal distance between an internal surface of at least one first wall of the second section of the first waveguide and an external surface of a wall of the second dielectric waveguide facing said first wall is D12 along said lateral direction, wherein D12<D11,
wherein the waveguide structure further comprises a protrusion located at said second end,
wherein at least one of (i) and (ii) is met:
(i) a minimal distance between the surface of said at least one first wall of the second section of the first waveguide and an external surface of a wall of the second dielectric waveguide facing said first wall is D13 along said lateral direction, wherein 0.25*λ2≤D13, wherein λ2 is a maximal wavelength of the second electromagnetic radiations, and
(ii) the protrusion comprises a portion extending from said at least one first wall towards the low band port along a distance D2, wherein D2 is less or equal to λ1, wherein λ1 is a central wavelength of the first electromagnetic radiations.

14 more elements

A feed for a dual-band antenna, comprising

a waveguide structure comprising:
a first waveguide configured to communicate first electromagnetic radiations falling in a first frequency range, wherein the first waveguide extends along a longitudinal direction, and
a second dielectric waveguide located within said first waveguide, said second waveguide being configured to communicate second electromagnetic radiations, said second electromagnetic radiations falling in a second frequency range, wherein the second frequency range is higher than the first frequency range,
said waveguide structure having
a first end whose extremity is configured to pass both first and second electromagnetic radiations,
a second end connected to:
a low band port configured to pass said first electromagnetic radiations, and
a high band port configured to pass said second electromagnetic radiations,
wherein the first waveguide comprises walls, wherein at least one of said walls comprises a first portion and a second portion, wherein:
the first portion extends, in said longitudinal direction, along a height of at least 0.6λ1, wherein λ1 is a central wavelength of the first electromagnetic radiations, and
for each plane orthogonal to the longitudinal direction in which the first portion is present, the first portion of said wall located in said plane protrudes inwardly towards the second waveguide with respect to the second portion of said wall located in said plane.

8 more elements

A feed for a dual-band antenna, comprising

a waveguide structure comprising:
a first waveguide configured to communicate first electromagnetic radiations falling in a first frequency range, and
a second dielectric waveguide located within said first waveguide, said second waveguide being configured to communicate second electromagnetic radiations, said second electromagnetic radiations falling in a second frequency range, wherein the second frequency range is higher than the first frequency range,
said waveguide structure having
a first end whose extremity is configured to pass both first and second electromagnetic radiations,
a second end connected to:
a low band port configured to pass said first electromagnetic radiations, and
a high band port configured to pass said second electromagnetic radiations,
a quarter-wave transformer, located at an interface between said first end of said waveguide structure and a reflector of the feed, wherein a distance D3 between the quarter-wave transformer and the second waveguide is such that D3>(λ2/4), wherein λ2 is a maximal wavelength of the second electromagnetic radiations.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/357,422Filed 19 Mar 2019
Priority: IL 25821619 Mar 2018
Published: US 2019/0288394 A119 Sep 2019
Granted: 19 Jan 2021
Term ends: Not estimatedThe source records don’t support an estimate.

Classification5 codes

H01Q 5/47
Using two or more feeds in association with a common reflecting, diffracting or refracting device: with a coaxial arrangement of the feeds
H01Q 5/335
Using frequency dependent circuits or components, e.g. trap circuits or capacitors: at the feed, e.g. for impedance matching
H01Q 5/392
Combination of fed elements with parasitic elements: the parasitic elements having dual-band or multi-band characteristics
H01Q 19/193
Comprising one main concave reflecting surface associated with an auxiliary reflecting surface: with feed supported subreflector