WO2013074870A1 - Antenna adapter - Google Patents
Antenna adapter Download PDFInfo
- Publication number
- WO2013074870A1 WO2013074870A1 PCT/US2012/065425 US2012065425W WO2013074870A1 WO 2013074870 A1 WO2013074870 A1 WO 2013074870A1 US 2012065425 W US2012065425 W US 2012065425W WO 2013074870 A1 WO2013074870 A1 WO 2013074870A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- adapter
- output ports
- antenna
- coupling cavity
- base
- Prior art date
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
- H01P5/02—Coupling devices of the waveguide type with invariable factor of coupling
-
- 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
-
- 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
- H01Q1/1207—Supports; Mounting means for fastening a rigid aerial element
Definitions
- This invention relates to a microwave antenna. More particularly, the invention relates to an antenna adapter enabling simplified microwave antenna feed interface configuration and/or exchange.
- a microwave antenna may be coupled to a wide range of signal generating and/or processing equipment, according to the end user's requirements, each with a different adapter and/or interface requirement.
- a microwave antenna may be provided with an adapter assembly for coupling a transceiver or the like to the microwave antenna.
- the interconnection may be, for example, a direct interconnection or via a waveguide which then couples to the desired signal generating and/or processing equipment.
- Microwave antennas may be provided with an interconnection with dual redundant transceivers, one of the transceivers provided as a hot standby to the other to improve the resulting RF system reliability.
- dual transceivers coupled to a single microwave antenna may be utilized simultaneously, each transceiver operating upon a signal with a different polarity, the signals separated and routed to each transceiver by an Orthomode Transducer (OMT).
- OMT Orthomode Transducer
- Providing microwave antennas in multiple models, each configured for a specific interconnection type and/or provided with elaborate adapter assemblies, can be a significant manufacturing, supply chain, installation and/or ongoing maintenance burden.
- Figure 1 is a schematic isometric view of an exemplary adapter aligned for insertion into the adapter seat of a flat panel antenna.
- Figure 2 is a schematic isometric front view of an adapter.
- Figure 3 is a schematic isometric back view of the adapter of Figure 2.
- Figure 4 is a schematic isometric front view of another adapter.
- Figure 5 is a schematic isometric back view of the adapter of Figure 4.
- Figure 6 is a schematic isometric front view of another adapter.
- Figure 7 is a schematic isometric back view of the adapter of Figure 6.
- Figure 8 is a schematic exploded isometric view of an adapter, demonstrating interconnections with the adapter seat of a flat panel antenna and two transceivers.
- Figure 9 is a schematic isometric exploded front view of an adapter with a coupling cavity.
- Figure 10 is a schematic isometric exploded back view of the adapter of Figure 9.
- Figure 1 1 is a schematic top view of a layer plate with a top layer overlay, demonstrating symmetrical output port alignment with the coupling cavity.
- Figure 12 is a schematic top view of a layer plate with a top layer overlay, demonstrating asymmetrical output port alignment with the coupling cavity.
- Figure 13 is a schematic top view of a layer plate with a top layer overlay, demonstrating symmetrical output port alignment with the coupling cavity, with a slotted sidewall layer utilizing pins.
- Figure 14 is a schematic isometric exploded front view of an adapter with a slotted sidewall layer utilizing pins.
- Figure 15 is a schematic isometric exploded back view of the adapter of Figure 14.
- an exemplary embodiment of an adapter includes a base 5 that seats within a recessed adapter seat 10 of an antenna 15 with a feed bore 20.
- the adapter seat 10 may be provided generally flush and/or protruding from the surface of the antenna 15.
- the base 5 may be retained seated upon and/or within the adapter seat 10, for example, by retaining elements 25 of the adapter seat 10 such as clips 30 dimensioned to engage interlock cavities 35 of the base 5.
- the retaining elements 25 may be provided integral with the, for example, machined, die cast or injection molded back side of an input layer of a flat panel-type antenna 15, extending from the adapter seat floor 40 and/or adapter seat sidewall 45.
- Corresponding interlock cavities 35 provided, for example, as retaining shoulders 50 provided in a periphery of the base 5 proximate, for example, cross corners of the base 5 receive and retain the base 5 in place.
- the retention between the base 5 and the adapter seat 10 may be permanent or releasable via access provided for prying and/or biasing the retaining elements 25 free of engagement with the corresponding interlock cavities 35.
- the retaining elements 25 may be provided as features of the base 5 and the interlock cavities 35 provided on the adapter seat 10 and/or conventional fasteners, such as screws or bolts may be applied.
- Environmental seals (not shown) may be applied, for example, surrounding the feed bore 20 between the adapter seat 10 and the base 5 and/or around a periphery of the base 5.
- the base 5 has a feed aperture 55 aligned coaxial with the feed bore 20 when the base 5 is seated within the adapter seat 10.
- the feed aperture 55 may have the same cross- section as the feed bore 20, provided for example as a generally rectangular, round or square cross-section, for example as shown in Figures 2-7.
- the base 5 may be provided with a coupler functionality, for example to divide the RF signals between dual signal paths to two transceivers 60 instead of just one.
- a generally rectangular coupling cavity 65 may be formed in the base 5, linking the feed aperture 55 to two or more output ports 70.
- the feed aperture 55 and the output ports 70 are provided on opposite sides of the coupling cavity 65.
- the coupling cavity 65 may be dimensioned, for example, with respect to the wavelength of the expected mid-band operating frequency. That is, the coupling cavity 65 may be provided with dimensions including, for example, a length of 1 .5 to 1 .7 wavelengths, a width of 0.75 to 1 wavelengths and a depth between the feed aperture 55 and the output ports 70 of approximately 0.2
- the output ports 70 may be provided with a generally rectangular cross-section, aligned along a length dimension of the coupling cavity 65 generally parallel to the length of the coupling cavity 65. As shown in Figures 1 1 and 12, the output ports 70 may be further aligned offset with respect to the coupling cavity 65, that is with a midpoint of a width of the output port 70 positioned along a length sidewall 75 of the coupling cavity 65, wherein generally one-half of the output port width is open to the coupling cavity 65. Further tuning of the electrical performance of the coupler cavity 65 may be applied, for example, by including tuning features 80 such as an inward projecting septum 85 provided upon, for example, each of the width sidewalls 90 of the coupling cavity, as best demonstrated in Figures 9 and 10. The tuning features 80 may be provided symmetrically with one another on opposing surfaces and/or spaced equidistant between the output ports 70. Alternatively, the tuning features 80 may be applied in an asymmetrical configuration.
- the level of coupling between the feed aperture 55 and each of the output ports 70 may be selected by, for example, applying the output ports 70 aligned symmetrically with a midpoint of the length sidewall 75 of the coupling cavity 65, as demonstrated in Figure 1 1 .
- the coupling between the feed aperture 55 and each of the output ports 70 may configured to be approximately 3 dB.
- the coupling between the feed aperture 55 and each of the output ports 70 may be reduced, for example, to approximately 6 or 10 dB, depending upon the level of asymmetrical displacement applied.
- the coupling cavity 65 may be configured with an enhanced thermal dissipation and/or thermal isolation characteristic by providing slots 90 open to an exterior of the adapter in the width and/or length sidewalls 75.
- the slots 90 may be, for example, orthogonal, forming sidewall elements with rectangular slots 90 between each.
- the slots 90 may be provided with a side-to-side width of, for example, 0.15 to 0.25 wavelengths of a mid-band operating frequency of the adapter.
- the sidewall elements may be provided as cylindrical pins 95.
- the pins 95 may be provided, for example, with a radius of 0.5 wavelengths or less of the mid-band operating frequency of the adapter.
- a further exterior seal may be applied, such as a polymeric cover or the like.
- the coupler configurations described herein above may also be applied in adapter embodiments separate from a recessed adapter seat mating configuration.
- the base 5 has been demonstrated as an element with minimal thickness to highlight the space savings possible.
- the adapter may include an extended feed aperture waveguide, for example extending the position of the coupler cavity 65 away from the adapter seat 10, closer to input ports 1 15 of attached transceivers 60 for example as shown schematically in Figure 8.
- a base 5 with a feed aperture 55 configured with a square or circular cross-section ( Figures 4-7) may extend prior to entering an OMT for division of simultaneous signals of different polarity prior to being routed to attached transceivers 60.
- the simplified geometry of the coupling cavities 65 may enable a significant simplification of the required layer surface features which may reduce overall manufacturing complexity.
- the base 5 may be formed cost-effectively with high precision in high volumes via injection molding and/or die- casting technology.
- One or more separate layers may be applied to arrive at the desired base assembly.
- a base layer 1 10 may be formed separately from a sidewall layer 100 and a top layer 105, which are then stacked upon each other to form the coupling cavity 65 within the final base assembly.
- the coupling cavity 65 may be formed with a recessed portion as the cavity that is then closed by a top layer 105 or the coupling cavity 65 may be formed as a recessed portion of the top layer 105 that is closed by the base layer 1 10.
- a conductive surface may be applied.
- coupling cavities and waveguides are described as generally rectangular, for ease of machining and/or mold separation, corners may be radiused and/or rounded and cavity tapers applied in a trade-off between electrical performance and
- the physical features within the adapter such as bores, steps, and/or slots become smaller and harder to fabricate.
- the coupling cavity 65 can simplify the physical features required, one skilled in the art will appreciate that higher operating frequencies are also enabled by the adapter, for example up to 26 GHz, above which the required dimension resolution/feature precision may begin to make fabrication with acceptable tolerances cost prohibitive.
Landscapes
- Waveguide Aerials (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12849115.6A EP2780978B1 (en) | 2011-11-16 | 2012-11-16 | Antenna adapter |
BR112014011073-5A BR112014011073B1 (en) | 2011-11-16 | 2012-11-16 | ANTENNA ADAPTER |
MX2014005725A MX337343B (en) | 2011-11-16 | 2012-11-16 | Antenna adapter. |
CN201280055059.XA CN103918123B (en) | 2011-11-16 | 2012-11-16 | Antenna adapter |
IN3443DEN2014 IN2014DN03443A (en) | 2011-11-16 | 2012-11-16 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/297,304 | 2011-11-16 | ||
US13/297,304 US8558746B2 (en) | 2011-11-16 | 2011-11-16 | Flat panel array antenna |
US13/677,859 | 2012-11-15 | ||
US13/677,859 US9160049B2 (en) | 2011-11-16 | 2012-11-15 | Antenna adapter |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013074870A1 true WO2013074870A1 (en) | 2013-05-23 |
Family
ID=48280015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2012/065425 WO2013074870A1 (en) | 2011-11-16 | 2012-11-16 | Antenna adapter |
Country Status (8)
Country | Link |
---|---|
US (1) | US9160049B2 (en) |
EP (1) | EP2780978B1 (en) |
CN (1) | CN103918123B (en) |
BR (1) | BR112014011073B1 (en) |
IN (1) | IN2014DN03443A (en) |
MX (1) | MX337343B (en) |
MY (1) | MY167100A (en) |
WO (1) | WO2013074870A1 (en) |
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2012
- 2012-11-15 US US13/677,859 patent/US9160049B2/en active Active
- 2012-11-16 IN IN3443DEN2014 patent/IN2014DN03443A/en unknown
- 2012-11-16 BR BR112014011073-5A patent/BR112014011073B1/en active IP Right Grant
- 2012-11-16 MX MX2014005725A patent/MX337343B/en active IP Right Grant
- 2012-11-16 WO PCT/US2012/065425 patent/WO2013074870A1/en active Application Filing
- 2012-11-16 EP EP12849115.6A patent/EP2780978B1/en active Active
- 2012-11-16 MY MYPI2014001173A patent/MY167100A/en unknown
- 2012-11-16 CN CN201280055059.XA patent/CN103918123B/en active Active
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US6292142B1 (en) | 1999-05-24 | 2001-09-18 | Raytheon Company | Locking assembly |
US20050146479A1 (en) * | 2003-02-05 | 2005-07-07 | Northrop Grumman Corporation | Low profile active electronically scanned antenna (AESA) for ka-band radar systems |
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Also Published As
Publication number | Publication date |
---|---|
BR112014011073A8 (en) | 2017-12-26 |
IN2014DN03443A (en) | 2015-06-05 |
US9160049B2 (en) | 2015-10-13 |
EP2780978A1 (en) | 2014-09-24 |
MX2014005725A (en) | 2014-05-30 |
CN103918123B (en) | 2016-08-24 |
BR112014011073B1 (en) | 2022-01-11 |
BR112014011073A2 (en) | 2017-06-13 |
MY167100A (en) | 2018-08-10 |
MX337343B (en) | 2016-02-26 |
CN103918123A (en) | 2014-07-09 |
EP2780978A4 (en) | 2015-07-29 |
EP2780978B1 (en) | 2021-06-16 |
US20130120089A1 (en) | 2013-05-16 |
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