Arrangement for interconnection of waveguide structures and a structure for a waveguide structure interconnecting arrangement
Pending Publication Date: 2021-05-27
GAPWAVES
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AI Technical Summary
Benefits of technology
The present invention provides an arrangement for interconnection of waveguide structures that overcomes problems associated with existing methods of interconnection. The arrangement is easy to use, operates quickly and reliably, and minimizes screwing and unscrewing, reducing the time and effort required for interconnection. This facilitates the analysis, calibration, or measurement of microwave or millimeter wave circuits or devices.
Problems solved by technology
Unless the conductive contact is very good, currents will flow between the flanges, resulting in a leakage, mismatch and losses which will reduce the performance of the circuit, and produce incorrect results in the case of measurements and calibrations, particularly at high frequencies.
These are difficult and time-consuming operations, in particular if several measurements need to be done, and may lead to incorrectly attached systems.
However, it is a disadvantage that it may still be a difficult and a time consuming operation to fasten the screws to connect the waveguide flange, even if the requirements as to tightening the screws are reduced, and similarly it is time consuming to loosen, remove, the screws at disconnection.
It has a drawback in that mechanical contact still is required, although no electrical contact is needed.
The mechanical contact is assured by means of screws as in other known arrangements, and the adapter has a drawback in that, if the screws are tightened too much, the adapter may easily be destroyed, or the adapter can result in pin marks in the sensitive flange surfaces, which then may be ruined.
However, the flanges or adapters discussed above have shown not to be suitable for production and operation at, for example, 60 GHz, or from 50-75 GHz, which is a wide band.
Actually, none of the designs are suitable for V-band flanges, which is a problem.
Further, in for example, a typical calibration procedure the operator has to connect the flanges of calibration standards and ports of a VNA, Vector Network Analyzer, a plurality of times. This is a very time consuming, complicated and tedious task, due to all the screws needed to achieve a good contact between all joining flanges.
The calibration procedure requires a stable and repeatable contact both mechanically and electrically, or at least mechanically, and therefore four screws should always used, but due to the time consuming and tedious work, sometimes for example, only two of the required number of screws, for example, four, required to ensure a good electrical contact, are actually tightened in practice.
If the connection is not perfect, for example, if there is a slight angular displacement or if there is not a perfect fit, there may be a leakage from the waveguide into free space, and also an increased reflection at the connection.
Method used
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Embodiment Construction
[0070]FIG. 1 shows a first embodiment of a waveguide structure interconnecting arrangement 100 according to the invention. The waveguide structure interconnecting arrangement 100 here comprises a flange adapter element adapted to be disposed between two waveguide flanges, a first waveguide flange 10 connected to a first waveguide 1, and a second waveguide flange 20 connected to a second waveguide 2 (see, for example, FIGS. 2 and 3A). The flange adapter element 100 comprises a waveguide flange element with a textured surface 15 (also denoted a periodic or quasi-periodic structure) here comprising a number of protruding elements 15, for example, pins, arranged on a conductive surface to form the periodic or quasi-periodic structure 15 on one side of the flange adapter element 100. The periodic or quasi-periodic structure 15 is arranged to surround a rectangular waveguide opening 3, of a through waveguide in the flange adapter element, on the cross-sectional sides of which metal rim se...
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An arrangement (100) for interconnection of waveguide structures (10,20) or components comprising a number of waveguide flange adapter elements (100) having a surface of a conductive material with a periodic or quasi-periodic structure (15) formed by a number of protruding elements (115) arranged or designed to allow waves to pass across a gap between a surface around a waveguide opening (3) to another waveguide opening in a desired direction or waveguide paths, at least in an intended frequency band of operation, and to stop propagation of waves in the gap in other directions. Interconnection with a waveguide flange or another waveguide flange adapter element is allowed without requiring electrical or conductive contact and assuring that the gap is present between the at least one surface (15) formed by periodically or quasi-periodically arranged protruding elements (115) and a surface around a waveguide opening of the other waveguide flange (20), hence assuring that the surface (15) formed by the periodically or quasi-periodically arranged protruding elements (115) is not in direct mechanical contact with the other, opposite, interconnecting, waveguide flange (20).
Description
FIELD OF THE INVENTION[0001]The present invention relates to an arrangement for interconnection of waveguide structures. The invention relates to arrangements for use in the high, or very high, frequency region, for example, above 30 GHz, or even above 300 GHz, but also for frequencies below 30 GHz. The invention also relates to a structure for an arrangement for interconnecting waveguide structures.BACKGROUND OF THE INVENTION[0002]For measuring and / or analyzing microwave or millimeter circuits and devices of different kinds, for example, from filters, amplifiers etc. to much more complex multifunction systems, but also for other purposes, waveguide structures need to be interconnected, and normally so called “waveguide flanges” are used as transitions. The requirements for a good conductive contact between waveguide flange surfaces are high. Unless the conductive contact is very good, currents will flow between the flanges, resulting in a leakage, mismatch and losses which will red...
Claims
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Login to View More IPC IPC(8): H01P1/04
CPCH01P1/042F16L23/032
InventorCARLRED, SIMONALFONSO ALÓS, ESPERANZAKILDAL, PER-SIMON
OwnerGAPWAVES