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Composite medium filter device and communication equipment including said device

A composite medium and filter technology, which is applied to waveguide-type devices, connection devices, selection devices, etc., can solve problems such as difficulty in obtaining isolation characteristics

Inactive Publication Date: 2004-07-28
MURATA MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, there is a problem that it is difficult to obtain the isolation characteristic to achieve the desired value

Method used

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  • Composite medium filter device and communication equipment including said device
  • Composite medium filter device and communication equipment including said device
  • Composite medium filter device and communication equipment including said device

Examples

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Embodiment Construction

[0020] refer to Figures 1A to 1D , figure 2 with image 3 , a description will be given of the structure of the duplexer of the first embodiment of the present invention.

[0021] Figures 1A to 1D Projections of each face of the duplexer are shown. Figure 1A One side of the duplexer is shown, where the open ends of the inner conductors are formed. Figure 1B A top view of a duplexer mounted on a substrate is shown. Figure 1C One side of the duplexer is shown, where the shorted end of the inner conductor is formed. Figure 1D One side of the duplexer to be mounted on the substrate is shown. As shown in the figure, the dielectric block 1, which is basically a parallel rectangular hexagonal block, includes seven inner conductor holes 2a to 2g arranged in parallel from one face to the opposite face. On each inner surface of the holes 2a to 2g, an inner conductor 3 is formed. In each of the inner conductor holes 2a to 2c and the inner conductor holes 2e and 2g, the inner...

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Abstract

The invention provides a composite dielectric filter device that can easily improve the isolation characteristics between mutually adjacent filters, even when using a compact dielectric block to miniaturize the entire configuration of the device. The invention also provides a communication apparatus incorporating the filter device. In the filter device, inner conductor holes are arranged inside a single dielectric block, and an outer conductor is formed on outer faces of the dielectric block. Additionally, an outer-conductor-free portion is formed at the boundary between a transmission filter and a reception filter formed by the inner conductor holes.

Description

technical field [0001] The present invention relates to a composite dielectric filter formed by arranging conductive films inside and outside a dielectric block, and a communication device including the composite dielectric filter. Background technique [0002] In the microwave band, the above filter is used as a band-pass filter or the like. Specifically, in a single dielectric block, a duplexer is provided by arranging a transmit filter that passes signals in the transmit band and blocks signals in the receive band and a transmit filter that passes signals in the receive band and blocks transmit The signal in the frequency band is formed by passing through the receiving filter. This duplexer is used as an antenna duplexer incorporated in mobile phones and the like. [0003] For a composite dielectric filter device using a single dielectric block including such a plurality of filters, an important point in designing such a device is to ensure isol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/205H01P1/212H01P1/213H01P5/08
CPCH01P1/2136H01P1/205
Inventor 岡山貴浩石原甚誠加藤英幸
Owner MURATA MFG CO LTD
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