TWI648910B - Phase controller for antenna array - Google Patents

Abstract

A phase controller for an antenna array includes: a determining circuit, a switching box, and a frequency synthesizing module, wherein the confirming circuit is configured to determine a direction index of an antenna array, and according to the direction index, according to a congruence modulus formula a phase index, the switching box is connected to the determining circuit, and, according to the phase index, selecting L first frequency signals having L different first phases from K first frequency signals of K different first phases, The frequency synthesis module is connected to the switch box, and includes L phase-coherent phase-locked loop frequency synthesizers to receive the L first frequency signals of the L different first phases, and generate L different second phases L second frequency signals are sent to L antennas of the antenna array for the purpose of simultaneously controlling a plurality of array antenna units.

Description

Phase controller for antenna array

The present invention relates to a phase controller, and more particularly to a phase controller for simultaneously controlling a plurality of array antennas.

In the structure of the signal processing system, a set of transmit/receive modules and phase shifters are connected to the back end of each antenna, wherein the transmit/receive module includes a low noise amplifier (LNA) and a power amplifier. (PA, power amplifier) and RF attenuators and other RF components. The function of the transmitting/receiving module is to provide power, and the role of the array antenna and the phase shifter is to form a beam, wherein reducing the number of components of the transmitting/receiving module, phase shifter, etc. is an important factor in system cost; The traditional design architecture is to connect each antenna to a transmit/receive module. However, this architecture is not economical for the following reasons: RF components are controlled in a digital manner, each component in a conventional periodic array antenna system. All must correspond to a set of control lines. If the component is composed of N antenna elements, the antenna structure requires N sets of control lines and N control units; if each antenna is connected to M RF elements, the antenna The structure will require a total of N x M sets of control lines and N x M sets of controllers. Such a large number of control lines and control modules not only cost manufacturing costs, but also increase the substrate space. In addition, too many control lines and RF components may also cause mutual interference between signals. Disturbance, causing energy loss and increasing the difficulty of process reduction.

In addition, if the period of an array antenna is too large, grating lobes are often generated, and the sidelobe wave will consume the energy of the main beam, which deteriorates the performance of the array antenna, which is also the most in designing the array antenna. Frequently encountered difficulties.

In view of the above disadvantages of the prior art, the main object of the present invention is to provide a phase controller for an antenna array, which calculates a direction index by the congruence modulus formula, and cooperates with K phase signals to generate corresponding L first frequencies. Signals to achieve phase controllers that simultaneously control multiple array antennas.

In order to achieve the above object, a phase controller for an antenna array according to the present invention generates a direction index of an antenna array by using a confirmation circuit, and calculates a phase index by a congruence modulus formula according to the direction index, the switch box Connecting the determining circuit, according to the phase index, selecting L first frequency signals having L different first phases from K first frequency signals of K different first phases, wherein the frequency synthesizing module is connected to the Switching the box, and comprising L phase-coherent phase-locked loop frequency synthesizers to receive the L first frequency signals of the L different first phases, and generating L second frequency signals of different second phases to The L antennas of the antenna array are used for the purpose of simultaneously controlling a plurality of array antenna units.

The above summary and the following detailed description and drawings are intended to further illustrate the manner and means by which the creation achieves its intended purpose. efficacy. Other purposes and advantages of this creation will be explained in the following description and drawings.

110‧‧‧Determining the circuit

120‧‧‧Switch box

130‧‧‧frequency synthesis module

L‧‧‧Number of antennas

K‧‧‧ Phase number

M‧‧‧frequency

Figure 1 is a schematic diagram of a phase controller for an antenna array of the present invention;

The embodiments of the present invention are described by way of specific examples, and those skilled in the art can readily understand the advantages and effects of the present invention from the disclosure of the present disclosure.

1 is a schematic diagram of a phase controller for an antenna array according to the present invention. As shown, the structure includes a determining circuit 110, a switching box 120, and a frequency synthesizing module 130. The determining circuit 110 is used. Determining a direction index of an antenna array, and calculating a phase index according to the coherent modulus formula according to the direction index, the switching box 120 is connected to the determining circuit, according to the phase index, from the K different first phases Selecting L first frequency signals having L different first phases from the K first frequency signals, and the L and K are integers greater than 1, the frequency synthesizing module 130 is electrically connected to the switching box, and includes L Phase phase-locked loop frequency synthesizers for receiving the L first frequency signals of the L different first phases and generating L second frequency signals of different second phases to L of the antenna array An antenna, wherein the K different first phases are 0, δ φ, 2 δ φ, ..., (K-1) δ φ, and the L different first phases are 0, Δθ, 2 Δθ, ..., (L-1) Δθ, the L The different second phases are 0, Δφ, 2△φ, ..., (L-1) Δφ, where δ φ is a phase resolution and equal to 2 π/K, Δφ is equal to k δ φ,k Is the direction index and is an integer, Δθ is equal to 1 δ φ, l is the phase index and is an integer, and if M and K are mutually prime integers, the congruence modulus formula is Ml≡k(mod K), M is a division frequency, and the K different first phases are 0, δ φ, 2 δ φ, ..., (K-1) δ φ, and the L different first phases are 0, Δθ, 2 △ θ, . . . , (L-1) Δθ, the L different second phases are 0, Δφ, 2 Δφ, . . . , (L-1) Δφ, where δ φ is a phase analysis Degree is equal to 2 π/K, △φ is equal to k δ φ, k is the direction index and is an integer, Δθ is equal to 1 δ φ, l is the phase index and is an integer, and if M=P/Q and P and Q is a prime integer, and the congruence modulus formula is Pl ≡ Qk (mod QK).

The above-described embodiments are merely illustrative of the features and functions of the present invention and are not intended to limit the scope of the technical content of the present invention. Any person skilled in the art can modify and change the above embodiments without departing from the spirit and scope of the creation. Therefore, the scope of protection of this creation should be as listed in the scope of the patent application described later.

Claims (3)

A phase controller for an antenna array, comprising: a determining circuit for determining a direction index of an antenna array, and calculating a phase index according to the coherent modulus formula according to the direction index; a switching box connecting the determination a circuit for selecting L first frequency signals having L different first phases from K first frequency signals of K different first phases according to the phase index, wherein L and K are integers greater than 1, And L is not greater than K; and a frequency synthesis module is connected to the switch box, and includes L phase-coherent phase-locked loop frequency synthesizers to receive the L first frequency signals of the L different first phases, and Generating L second frequency signals of different second phases to L antennas of the antenna array, wherein a second frequency of the second frequency signal is greater than a first frequency of the first frequency signal. The phase controller for an antenna array according to claim 1, wherein the K different first phases are 0, δ φ, 2 δ φ, ..., (K-1) δ φ, The L different first phases are 0, Δθ, 2 Δθ, ..., (L-1) Δθ, and the L different second phases are 0, Δφ, 2 Δφ, ..., (L-1) Δφ, where δ φ is a phase resolution and equal to 2 π/K, Δφ is equal to k δ φ, k is the direction index and is an integer, Δθ is equal to 1 δ φ, l is the phase The index is an integer, and if M and K are mutually prime integers, the congruence modulus formula is Ml≡k(mod K), where M is a division frequency. The phase controller for an antenna array according to claim 1, wherein the K different first phases are 0, δ φ, 2 δ φ, ..., (K-1) δ φ, The L different first phases are 0, Δθ, 2 Δθ, ..., (L-1) Δθ, and the L different second phases are 0, Δφ, 2 Δφ, ..., (L-1) Δφ, where δ φ is a phase resolution and equal to 2 π/K, Δφ is equal to k δ φ, k is the direction index and is an integer, Δθ is equal to 1 δ φ, l is the phase The index is an integer, and if M=P/Q and P and Q are mutually prime integers, the congruence modulus formula is P1≡Qk(mod QK), where M is a division frequency.