Radio direction and position finding apparatus
First Claim
1. A radio direction and position finding apparatus comprising;
- a first directional antenna which rotates with a desired angle elevation;
a first phase integral means for producing an output through an integration of output from said directional antenna;
a first phase difference means for producing an output as a difference of the outputs from said first directional antenna;
a first frequency dividing means for dividing frequency of integral component of the output from said directional antenna;
a first differential gain control means for controlling gain of differential component of the output from said directional antenna;
a first receiving means for receiving output from said first frequency dividing means and producing a detection signal output;
a second receiving means for receiving output from said first differential gain control means and producing a detection signal output;
a first subtraction means for subtracting one detection signal output from the other detection signal output of said first and second receiving means;
a first calculation means for determining a direction of arrival of radio wave based on output from said first subtraction means;
a second directional antenna which rotates with a desired angle of elevation;
a second phase integral means for producing an output through an integration of output from said second directional antenna;
a second phase difference means for producing an output as a difference of the outputs from said second directional antenna;
a second frequency dividing means for dividing frequency of integral component of the output from said second directional antenna;
a second differential gain control means for controlling gain of differential component of the output from said second directional antenna;
a third receiving means for receiving output from said second frequency dividing means and producing a detection signal output;
a fourth receiving means for receiving output from said second differential gain control means and producing a detection signal output;
a second subtraction means for subtracting one detection signal output from the other detection signal output of said third and fourth receiving means;
a second calculation means for determining a direction of arrival of radio wave based on output from said second subtraction means; and
a position determining calculation means for determining the position of the emission source of the radio wave based on outputs from said first and second calculation means;
wherein said directional antenna and said second directional antenna rotate interlockingly.
1 Assignment
0 Petitions
Accused Products
Abstract
A detection apparatus is provided to detect the direction of arrival and the position of an emission source of radio wave with high accuracy. The apparatus comprises; a first and a second directional antenna 1 and 10 which rotates with a desired angle of elevation; a first and a second phase integral means 2 and 11 for outputting an integration of the output from an antenna; a first and second phase differential means 3 and 12 for outputting an difference of the outputs from an antenna; a first and a second frequency dividing means 4 and 13 for dividing frequency of the integral component of the output from an antenna; a first and a second differential gain control means 5 and 14 for controlling a gain of the differential component of the output from an antenna; a first and a third receiving means 6 and 15 for receiving an output of the frequency dividing means; a second and a fourth receiving means 8 and 17 for receiving an output of the differential gain control means; a first and a second subtraction means 7 and 16 for subtracting one detection signal output from the other detection signal output of each of receiving means 6 and 8 and receiving means 15 and 17; a first and a second calculation means 9 and 18 for determining a direction of arrival of radio wave based on an output from the subtraction means; and a position determining calculation means 19 for determining the position of the emission source of the radio wave based on an output from the calculation means.
5 Citations
6 Claims
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1. A radio direction and position finding apparatus comprising;
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a first directional antenna which rotates with a desired angle elevation;
a first phase integral means for producing an output through an integration of output from said directional antenna;
a first phase difference means for producing an output as a difference of the outputs from said first directional antenna;
a first frequency dividing means for dividing frequency of integral component of the output from said directional antenna;
a first differential gain control means for controlling gain of differential component of the output from said directional antenna;
a first receiving means for receiving output from said first frequency dividing means and producing a detection signal output;
a second receiving means for receiving output from said first differential gain control means and producing a detection signal output;
a first subtraction means for subtracting one detection signal output from the other detection signal output of said first and second receiving means;
a first calculation means for determining a direction of arrival of radio wave based on output from said first subtraction means;
a second directional antenna which rotates with a desired angle of elevation;
a second phase integral means for producing an output through an integration of output from said second directional antenna;
a second phase difference means for producing an output as a difference of the outputs from said second directional antenna;
a second frequency dividing means for dividing frequency of integral component of the output from said second directional antenna;
a second differential gain control means for controlling gain of differential component of the output from said second directional antenna;
a third receiving means for receiving output from said second frequency dividing means and producing a detection signal output;
a fourth receiving means for receiving output from said second differential gain control means and producing a detection signal output;
a second subtraction means for subtracting one detection signal output from the other detection signal output of said third and fourth receiving means;
a second calculation means for determining a direction of arrival of radio wave based on output from said second subtraction means; and
a position determining calculation means for determining the position of the emission source of the radio wave based on outputs from said first and second calculation means;
wherein said directional antenna and said second directional antenna rotate interlockingly. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification