Novel adjustable resonator

[0015] Attached Figure , To further explain the invention in detail.

[0016] See Figure 1, Figure 2. The adjustable resonator 100 of this embodiment includes a housing and a fixed internal conductor 101. The housing is composed of a housing wall 102, a housing bottom 107, and a housing cover 112; wherein the housing is at least partially made of conductive material And the inside is a resonant cavity 110, and the inner conductor 101 is electrically connected to the bottom 107 of the case.

[0017] The adjustable resonator 100 further includes a movable resonant frequency adjusting member 120, the resonant frequency adjusting member 120 includes a cylindrical conductive adjusting element, a conductive upper plate 105 and a dielectric support element 111, wherein the conductive adjusting element body is longitudinal The conductive valve stem 103 is provided with a conductive cap 104 at the upper end; the conductive valve stem 103 extends along the central axis of the housing and is perpendicular to the conductive cap 104, and the conductive upper plate 105 is arranged in the housing. The following table Surface with conductive cap 104 Above table There is a certain gap between the surfaces; the dielectric support element 111 connects the conductive adjustment element and the conductive upper plate 105 and passes through the cover 112. The adjusting member 120 realizes longitudinal movement by means of the part of the medium supporting element 111 outside the housing; the conductive upper plate 105 extends on a horizontal surface, and its outer surface is adjacent to the shell wall 102, The following table The surface defines the effective height of the resonant cavity 110. Preferably, the cross-sectional area of ​​the conductive upper plate 105 is larger than the cross-sectional area of ​​the conductive cap 104.

[0018] The inner conductor 101 is provided with a cylindrical groove 115 with an upward opening; the groove 115 is coaxial with the conductive valve stem 103, and has a diameter larger than that of the conductive valve stem 103, so that when the adjusting member 120 moves downward , The conductive valve stem 103 can be at least partially inserted into the groove 115. The inner surface of the groove 115 or the outer surface of the conductive valve stem 103 or both are coated with a dielectric coating 130 to ensure that there is no electrical conduction between the groove 115 and the conductive valve stem 103.

[0019] When the resonance frequency adjusting member 120 is at the uppermost position, the distance between the conductive valve stem 103 and the inner conductor 101 reaches the maximum, and the resonance frequency is the largest; when the resonance frequency adjusting member 120 moves down until the conductive valve stem 103 When the part is mated and connected with the inner conductor 101, the distance between the conductive valve stem 103 and the inner conductor 101 is reduced, the resonance frequency is reduced, and the capacitance between the conductive valve stem 103 and the inner conductor 101 is increased. In particular, from the stage where the part of the conductive valve stem 103 is matched and connected with the inner conductor 101 to when the conductive valve stem 103 is completely matched and connected with the inner conductor 101, the resonance frequency slowly increases back.