S/N intensifier

A booster and filter technology, applied in electric/electric converters, motor generators/starters, waveguide devices, etc., can solve problems such as low power

Inactive Publication Date: 2003-12-03
ELECTRONICS & TELECOMM RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0011] In the above way, there is an advantage that the input/output characteristics are exce...

Method used

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Embodiment Construction

[0026] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0027] Figure 3a A functional block diagram of an S / N enhancer according to the first embodiment of the present invention is shown. The S / N enhancer includes a balanced switching coupler 410 , a saturated magnetostatic wave filter 420 , a linear magnetostatic wave filter 430 and a power combiner 440 .

[0028] The balun coupler 410 is a balun for receiving one input signal and outputting two output signals with a phase difference from each other. Each of the two output signals is output as a balanced or unbalanced signal by dividing as required into the power of the input signal. The balanced conversion coupler used in the present invention is not limited to this particular embodiment, as long as it can realize the above-mentioned functions. For example, a commercially available balun coupler having a wide band using a microstrip line and implemented in a ...

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Abstract

A S/N enhancer using the magnetostatic wave signal is disclosed. The S/N enhancer comprises a balun coupler for receiving an first signal and dividing two second signals having the same power and the phase difference of 180 degree; a saturation magnetostatic wave filter for receiving one of the two second signals output from the balun coupler, converting that into a magnetostatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the power of the magnetostatic wave signal is saturated if the received second signal has the power of equal to and more than that of a noise signal; a linear magnetostatic wave filter for receiving the other of the two second signals from the balun coupler, converting that into a magnetosatic wave signal, and oppositely converting the magnetostatic wave signal, wherein the received second signal is converted into the magnetostatic wave signal having an energy linear to the power of the input signal; and a power synthesizer for synthesizing the respective signals output from the saturation magnetostatic wave filter and the linear magnetostatic wave filter.

Description

technical field [0001] The present invention relates to a signal-to-noise (hereinafter referred to as "S / N") booster, and more particularly, to a signal-to-noise booster realized by using a balun coupler and a magnetostatic wave filter . Background technique [0002] Recently, due to miniaturization of digital broadcasting systems, satellite broadcasting systems, mobile communication systems, satellite communication systems, a low-cost lightweight S / N booster is required. Also, in terms of characteristics, an S / N enhancer having low insertion loss, high S / N ratio, wide band, and low power consumption is required. [0003] Hereinafter, a conventional S / N enhancer will be described with reference to the accompanying drawings. [0004] First, see figure 1 , "Reflective MSW (Magnetostatic Wave) Signal Noise Booster in 400 MHz Bandwidth" by Takao Kuki and Toshihiro Nomoto, 1995 IEEE MTT-S Abstracts, Vol. 41, No. 8, pp. 111-114, will be described. Discl...

Claims

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Application Information

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IPC IPC(8): H01P1/215H01P1/23H01P5/10H01P5/19H04N5/52
CPCH01P5/10H04N5/52
Inventor 田东锡李相硕崔泰求韩镇宇金铜暎李弘烈
Owner ELECTRONICS & TELECOMM RES INST
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