JPH03113505U - - Google Patents

Description

[Brief explanation of the drawing]

1 to 13 relate to embodiments of the present invention; FIG. 1 is a perspective view of the first embodiment, FIG. 2 is a sectional view of FIG. 1, and FIGS. A sectional view of a modification of the first embodiment, FIGS. 4a and 4b are sectional views of another modification of the first embodiment, respectively.
FIG. 5 is a sectional view of still another modification of the first embodiment. FIG. 6 is a sectional view of a second embodiment of the present invention. 7a, b, and c are sectional views, respectively, of a modification of the second embodiment; FIGS. 8a, b are sectional views of yet another modification of the second embodiment; and FIG. 9a, 9 is an exploded perspective view of a bandpass filter using a dielectric filter corresponding to the first embodiment, FIG. 9b is a partial front view of the dielectric block of FIG. 9a, viewed from the open end surface, and FIG. 10 a
10 is an exploded perspective view of a bandpass filter using a dielectric filter corresponding to the second embodiment, FIG. 10b is a perspective view of the dielectric filter of FIG. 10a viewed from the opposite direction, and FIG. Figure 10d is a partial front view of the dielectric block viewed from the short-circuit side end face; Figure 10d is a partial front view of the dielectric block viewed from the open side end face;
Figure 1a is an exploded perspective view of another bandpass filter for a receiver using a dielectric filter according to the second embodiment of the present invention, and Figure 11b is an exploded perspective view of the dielectric filter of Figure 11a in the opposite direction. Perspective view from 12th
Figure a is an exploded perspective view of a bandpass filter for a transmitter using a dielectric filter according to the second embodiment of the present invention, and Figure 12b is a view of the dielectric filter of Figure 12a from the opposite direction. FIG. 13 is an exploded perspective view of an antenna duplexer using dielectric filters according to the first embodiment as bandpass filters for a transmitter and a receiver. FIG. 14 is a perspective view of a conventional example, and FIG. 15 is an exploded perspective view of an antenna duplexer using a dielectric filter according to the conventional example. 1... Dielectric block, 2, 3... End surface, 2a-2
c, 3a to 3c...stepped portion, 2d, 3d...stepped side, 2A, 2B, 3A, 3B...slanted surface, 4...side, 5a to 5e...resonator hole, 7a to 7e...inner conductor,
8...Outer conductor.

Claims (1)

[Claims for Utility Model Registration] (1) It has a dielectric block 1, inner conductors 7a to 7e, and an outer conductor 8, and the dielectric block 1 has one end surface 2 serving as the resonator open side end surface, and the other end surface 3 is the short-circuit side end face of the resonator, and a plurality of resonator holes 5a to 5e
is formed to penetrate between the end surfaces 2 and 3, and each of the resonator holes 5a to 5e constitutes a part of the resonator, and The distance between the inner conductors 7a to 7e is the resonator length of the resonator, and the inner conductors 7a to 7e are connected to each of the resonator holes 5a to 5.
The outer conductor 8 is formed on the four side surfaces 4 of the dielectric block 1, and the short-circuit side end surface 3 is formed on the inner peripheral surface of the dielectric block 1.
A short-circuiting electrode film 9 is formed to short-circuit the dielectric block 1 and the outer conductor 8, and the dielectric block 1 has a step on at least one side of the open side end face 2 or the short-circuit side end face 3 corresponding to the resonant frequency of each resonator. Shapes 2a to 2c, 3a
~3c or inclined shape 2A, 2B, 3A, 3B
and step shapes 2a to 2c, 3a to
A dielectric filter characterized in that the open side end face 2 or the short circuit side end face 3 of the dielectric filter 3b has stepped side faces 2d and 3d that are vertical or inclined surfaces. (2) An antenna duplexer comprising a bandpass filter, the bandpass filter comprising the dielectric filter according to claim (1).