Coupling arrangements in resonant devices

Claim 2

A resonant device having a plurality of resonant cavities in a common block at least two adjacent ones of which exhiBit in operation magnetic fields of opposing phase, and a co-axial transmission line formed by an annular hole of at least substantially constant cross-sectional dimensions throughout its length extending into said block only to such depth that a portion only of the annular hole to one side of the inner wall forming member breaks into one of said two cavities and a portion only of the annular hole to the opposite side of said inner wall forming member breaks into the other of said two cavities to effect coupling to or from said device while leaving said inner wall forming member integrally joined with said block.

Claim 3

A resonant device as claimed in claim 1 and wherein means are provided for varying the value of reactance presented by the transmission line to said two cavities where they communicate with the transmission line to effect tuning of the said device.

Claim 4

A resonant device as claimed in claim 2 and wherein a conductive cylinder is provided to extend the outer wall of said annular hole away from said two cavities beyond the inner wall forming member and a tuning piston is provided in said cylinder adjustable to move towards or away from the end of said inner wall forming member.

Claim 5

A resonant device as claimed in claim 2 and wherein a multipactor discharge arrangement is provided at the end of said transmission line remote from said cavities, the whole arrangement being such that change in capacitance of said multipactor discharge arrangement causes the reactance presented to each of said two cavities where they communicate with said transmission line to be altered.

Claim 6

A resonant device comprising an anode block having at least a pair of adjacent and parallel resonant cavities each of substantially constant cross section and which in operation exhibits magnetic fields of opposite phases extending lengthwise in said cavities, and a coaxial transmission line of substantially constant cross section throughout coupled to said resonant cavities; said transmission line being defined within a cavity having a closed outer end portion and an inner wall surface of substantially constant cross section extending at least from adjacent said closed outer end portion axially normal to a plane containing the axes of said cavities and into intersection with said cavities, and a member of substantially constant cross section projecting coaxially within said cavity from that portion of the anode block between said cavities to a region spaced from said closed end portion of the cavity, said inner wall surface and said member constituting said transmission line and defining an annular hole of substantially constant cross section with the outer dimension of said hole transverse of the plane containing the axes of said cavities being greater than the spacing between said axes but less than the transverse spacing between those surfaces of the cavities which are most remote from each other, and with the inner transverse dimension of said hole being less than said spacing between said axes but greater than the transverse spacing between those surfaces of the cavities which are closest together, whereby said member is integral with said block and forms the inner conductor of the coaxial transmission line while said wall surface forms the outer conductor thereof and with said transmission line being coupled to said cavities to a degree dependent upon said transverse dimensions of the annular hole.

Claim 7

A resonant device comprising an anode block having at least a pair of adjacent and parallel resonant cavities each of substantially constant cross section and which in operation exhibits magnetic fields of opposite phases extending lengthwise in said cavities, and a coaxial transmission line of substantially constant cross section throughout coupled to said resonant cavities; said transmission line being defined within a cavity having a closed outer end portion and an inner wall surface of substantially constant cross section extending at least from adjacent said closed outer end portion axially normal to a plane containing the axes of said cavities and into intersection with said cavities, and a member of substantially constant cross section projecting coaxially within said cavity from that portion of the anode block between said cavities to a region spaced from said closed end portion of the cavity, said inner wall surface and said member constituting said transmission line and defining an annular hole of substantially constant cross section with the outer dimension of said hole transverse of the plane containing the axes of said cavities being greater than the spacing between said axes but less than the transverse spacing between those surfaces of the cavities which are most remote from each other, and with the inner transverse dimension of said hole being less than said spacing between said axes but greater than the transverse spacing between those surfaces of the cavities which are closest together, whereby said member is integral with said block and forms the inner conductor of the coaxial transmission line while said wall surface forms the outer conductor thereof and with said transmission line being coupled to said cavities to a degree dependent upon said transverse dimensions of the annular hole.

Claim 8

A resonant device according to claim 5 wherein each of said cavities, said wall surface and said member are of cylindrical cross section.

Claim 9

A resonant device as defined in claim 6 wherein said closed end portion is defined by an end wall intersecting the outer end of said wall surface, said member terminates in spaced relation from said end wall, and including a tuning device disposed between said member and said end wall.

Claim 10

A resonant device as defined in claim 7 wherein said tuning device is in the form of a piston movable toward and away from said member.

Claim 11

A resonant device as defined in claim 8 wherein said tuning device is in the form of a multipactor discharge device.

Claim 12

A resonant device as defined in claim 6 wherein said closed outer end portion is defined by a dome of dielectric material enclosing the outer end of said transmission line.