JPS63275206A - Antenna apparatus - Google Patents

Abstract

PURPOSE:To efficiently transmit a microwave power by correcting the bariance of the phase of a composite electric field by means of changing a phase setting with the aid of a beam direction error correction processor. CONSTITUTION:The beam direction error correction processor 4, which corrects the influence of a quantized phase error by means of changing the phase of partial elements among element antenna groups Ea1, Ea2,...EaN, which were given an equal set phase, is provided. Then, the error is corrected by the beam direction error correction processor 4 by changing the phase of the partial elements so that the phase of the composite electric field comes to the same phase. Thus, the microwave power is efficiently transmitted.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides an antenna that transmits microwave power by changing the phase of radio waves received by a plurality of element antennas and scanning a composite beam of the entire antenna. It is related to the device.

[Conventional technology]

Figure 3 shows, for example, Nikkei Electronics 1B72,7゜1
FIG. 7 is a diagram showing the configuration of a conventional antenna device based on the one shown in No. 7 pp. 84-101.

2 in the figure, Ba1. Ba2. -, ]? aN is an element antenna.

Ph1, Ph2,..., PhN are digital phase shifters, (1) are element antennas Ffa1, Ffa2
, ..., a synthesizer that synthesizes the BaH received signals, (
2) is a receiver, (3) is a digital phase shifter Phl,
This is a beam control processor that calculates the set amounts of Ph2, . . . , PhN.

Next, the operation will be explained.

The radio signals received by Fjal, Ba2,..., FiaN are passed through digital phase shifters Ph1, Ph2,
..., the phase can be changed by PhN. After that 9
The above radio wave signals are combined in a combiner (1), and sent to a receiver (2).
is transmitted to. At this time, the beam control processor (3) calculates the setting amount of the valley phase shifter. For example, any direction θS
When scanning a beam in the above direction, let the phase of the receiving '1 field of the element antenna F1a1, Ba2, -, EaN whose observation direction is the above direction be Pl, P2°..., PN, then the common phases Q1, Q2 ,...,qN(qi=-
pl) is applied to the valley digital phase shifter. Here, when the number of bits of the digital phase shifter is M, the minimum phase change amount θB is given by the fi+ equation.

θB = 360/2M fi
+When this digital phase shifter is used, the actually set phase qi is given by equation (2).

qt=(Q1/θB)xθB(2) ([ ] represents the nearest integer) [Problems to be solved by the invention] Since the conventional antenna device is configured as described above, the number An error e1 expressed by equation (3) will occur.

es −qt −Qt (8)
The above e1 is called a quantization phase error. Due to this quantization phase error e1, the phases of the transmitted electric fields are not aligned and a loss occurs in the transmitted power.

This invention was made to solve the above-mentioned problems, and an object thereof is to obtain an antenna device that efficiently transmits microwave power.

Means for Solving Problem c] The antenna device according to the present invention reduces the influence of quantization phase error by changing the phase of some elements in a group of element antennas given a set phase equal to 1. This system is equipped with a beam direction error correction processor that corrects the beam direction error.

[Effect]

In the antenna device according to the present invention, a beam direction error correction processor changes the phases of some of the elements so that the phases of the combined electric fields are in phase, thereby preventing a decrease in the combined power.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, (4) is a beam direction error correction processor, and the other components are the same as the conventional device shown in FIG. This beam direction error correction processor will be explained. FIG. 3 is a diagram showing electric fields of eight elements given the same phase as shown in FIG. 2; In FIG. 2, the dotted line shows the electric field vector when an analog phase is given, and the solid line shows the electric field vector when a quantized phase is given. An error electric field Br is generated between the two. In order to correct this Er, the n set phases expressed by the following equations may be delayed by θB if the amount indicated by φ in Figure 2 is positive, and advanced by θB if φ is negative.

By performing this correction, Erζ0 is obtained.

The error with the combined electric field when an analog phase is given is corrected. Therefore, microwave power is efficiently transmitted.

〔Effect of the invention〕

As described above, according to the present invention, the variation in the phase of the combined electric field is corrected by changing the multiphase settings in the beam direction error correction processor, so that microwave power can be efficiently transmitted.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an antenna device according to an embodiment of the present invention, FIG. FIG. 3 is a diagram showing a conventional antenna device. In the figure, (1) is a combiner, (2) is a receiver, (3) is a beam control processor, (4) is a beam direction error correction processor, Eal, Ba2,...-, BaN is an element antenna, and Ph1° Ph2,..., PhN are digital phase shifters. In the figures, the same reference numerals indicate the same parts or the monk parts.

Claims (1)

[Claims] A plurality of element antennas, a digital phase shifter connected to the element antenna, a combiner that combines the outputs of the element antennas after passing through the digital phase shifter, and a receiver connected to the combiner. , a beam control processor that calculates a set phase of the digital phase shifter, and an antenna device that transmits or receives microwave power, a beam direction that corrects a direction error due to a quantization phase error of the digital phase shifter. An antenna device characterized by being provided with an error correction processor.