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Polarized wave measuring apparatus, and antenna characteristic apparatus and radio wave measuring apparatus using same

A technology of measuring devices and polarized waves, applied in measuring devices, measuring electrical variables, radio transmission systems, etc., can solve problems such as complex structures

Inactive Publication Date: 2004-06-30
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, since the conventional device needs to detect the phase information of the radio wave at the frequency of the carrier signal to measure the polarization characteristics of the radio wave, there is a problem that it requires a very complicated structure

Method used

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  • Polarized wave measuring apparatus, and antenna characteristic apparatus and radio wave measuring apparatus using same
  • Polarized wave measuring apparatus, and antenna characteristic apparatus and radio wave measuring apparatus using same
  • Polarized wave measuring apparatus, and antenna characteristic apparatus and radio wave measuring apparatus using same

Examples

Experimental program
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Effect test

Embodiment 1

[0042] figure 1 A block diagram showing the configuration of the polarized wave measurement device according to the first embodiment of the present invention. The polarized wave measuring device is a polarized wave measuring device mounted on a radio wave measuring device. figure 1 The polarized wave measuring device in is mainly composed of a first antenna 1, a second antenna 2, a first signal frequency band limiting part 3, a second signal frequency band limiting part 4, a first field density detection part 7, and a second field density detection part 8 , a phase shifting part 9, a first signal mixing part 10, a second signal mixing part 11, a first low-pass filtering part 16, a second low-pass filtering part 17, a phase difference calculation part 20 and a polarization calculation part 24.

[0043] The first antenna 1 receives radio waves, and outputs radio signals to the first signal band limiting section 3 . The second antenna 2 receives radio waves perpendicular to the...

Embodiment 2

[0078] Embodiment 2 will describe the case of measuring the polarization of radio waves arriving from various directions using the polarized wave measuring device of Embodiment 1.

[0079] Figure 4 A block diagram showing the configuration of a radio wave measurement device according to Embodiment 2 of the present invention. However, with figure 1 The same elements as those in are assigned the same reference numerals and detailed description thereof will be omitted. Figure 4 The radio wave measuring device in the figure 1 The radio wave measurement device in is characterized in that: the device has a turntable 41, a rotation control device 42 and a recording part 45, measures the polarization mode by rotating the antenna, and records the polarization measurement result by combining the antenna rotation polarization angle.

[0080] This embodiment will describe an example in which a radio wave measuring apparatus uses a cross Yagi antenna for the first antenna 1 and the se...

Embodiment 3

[0092] Embodiment 3 will describe an example of measuring antenna characteristics using the polarized wave measuring device of Embodiment 1. Figure 5 is a block diagram illustrating the configuration of the antenna characteristic measuring device of this embodiment. However, with figure 1 or image 3 The same elements are assigned as figure 1 or image 3 The same reference numerals as in and detailed description thereof will be omitted.

[0093] Figure 5 The antenna characteristic measuring device in is different from the figure 1 and figure 2 The characteristics of the radio wave measurement device in are: the device has an antenna 46 to be measured and a transmission source 47, the antenna for measuring the polarization mode is directed to the antenna to be measured, the antenna to be measured is rotated and any direction in the rotation plane Angular measurements include the antenna gain characteristics of the polarization.

[0094] More specifically, the cross-y...

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Abstract

The phase shift section 9 phase-shifts the second band-restricted signal 6 to the first phase-shifted signal 12 and phase-shifted signal 13 whose phase is different from the phase of the first phase-shifted signal by 90 degrees. The first signal mixing section 10 mixes the first band-restricted signal 5 and the first phase-shifted signal 12. The second signal mixing section 11 mixes the second band-restricted signal 6 and the second phase-shifted signal 13. The phase difference calculation section 20 calculates the phase difference value 23 from the first mixed signal 14 and the second mixed signal 15 stripped of frequencies other than a desired baseband frequency. The polarization calculation section 24 calculates reception polarization from the first reception field intensity value 21, second reception field intensity value 22 and phase difference value 23.

Description

technical field [0001] The present invention relates to a polarized wave measuring device, an antenna characteristic measuring device and an antenna electric wave measuring device using the polarized wave measuring device, and more particularly to a measuring device applied to estimation of antennas used in radio communication equipment. Background technique [0002] Radio waves are usually defined in terms of field density and polarization. However, the radio waves actually received by the antenna are usually only estimated using the field density. Therefore, the polarization system is considered only in special cases such as communication using an antenna that takes advantage of the circular polarization characteristic. [0003] The reason why the estimation of the polarization mode is not considered is that the propagation of radio waves between the transmitting and receiving sides in communication over a relatively wide range such as broadcasting is very complicated due...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R29/10G01R29/08H04B7/08H04B7/10
CPCH04B17/0057G01R29/0892H04B7/0848H04B7/10H04B17/318G01R29/08H04B17/00
Inventor 三村政博中川洋一宫野谦太郎小柳芳雄
Owner PANASONIC CORP