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Microstrip filter device

A filter and frequency band technology, applied in the field of microstrip filter devices, can solve problems such as construction constraints, and achieve the effects of low cost, low loss, and high power processing capability

Inactive Publication Date: 2005-04-06
INTEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The design requirements of such filters may impose constraints on construction

Method used

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  • Microstrip filter device
  • Microstrip filter device
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Embodiment Construction

[0028] figure 1 A filter arrangement according to a preferred embodiment of the present invention is shown with the cover removed for clarity. The filter device includes a first input device 101 , a first output device 102 , and a second output device 103 . The input signal comprises at least two different frequency bands, which in the described preferred embodiment comprise the GSM frequency band at 900Mhz and the PCN frequency band at 1800Mhz. However, the present invention can also be applied to other specific frequency bands. The input signal is fed to first low-pass filter means 104, which will be described below, and to second band-pass filter means 105. The second bandpass filter means is used to filter the input signal according to the second filtering method, which accepts the input signal through the input device 101 and passes the input signal through several coaxial resonators 106, thereby producing a bandpass filtered signal, In order to enable it to pass throu...

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Abstract

The present invention provides a filter for achieving a small, low cost filter means for high-power applications. This is achieved by providing a filter comprising a first and a second signal port 101, 102 arranged to pass signals of said first frequency band and at least a first ground plane means. The filter further comprising an elongated conductor, 111, coextending substantially in parallel with the ground plane means providing a first signal path for said frequency band between the first and second ports, at least a first conductive segment, 107, having first radio frequency characteristics and being connected to the signal path at a first interconnection point and where the first characteristics and the position of the first interconnection point being selected such that radio frequencies outside the first frequency band are effectively attenuated in the first signal path. The filter being characterized in that the elongated conductor and the conductive segment being formed partly by a planar dielectric material, having a relative dielectric constant substantially greater than one, provided with a conductive pattern and partly by a self supporting conductor, the first interconnection point and the ground plane means being separated by a dielectric in the form of a gas.

Description

technical field [0001] The present invention generally relates to a high-power filter arrangement, and more particularly to a microstrip filter arrangement. Background technique [0002] The ever-increasing number of users in various cellular telephone systems has resulted in a maximum number of simultaneous calls at peak call intensity due to limited available frequency bands. Thus, operators are restricted from adding new subscribers to the cellular system. This is solved by introducing new frequency bands for communication. For example, a mobile phone system with a bandwidth of 900Mhz is supplemented by PCS / GSM 1800Mhz in some areas. A user with a dual-band cellular phone can thus communicate using either of the two frequency bands in order to reduce traffic congestion and thus the operator can get more users into the combined system and thus earn more revenue. [0003] Use of two different frequency bands by one operator may require the operator to use two different a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01P1/213
CPCH01P1/2135H01P1/203H03H7/0138
Inventor 来福·林德奎斯特
Owner INTEL CORP
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