Time modulation amplitude-phase control system and method based on power cancellation and control method
A technology of time modulation and amplitude and phase control, which is applied to electrical components, antennas, etc., can solve problems such as reduction, achieve high-precision amplitude and phase control, and broaden the use of bandwidth.
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Embodiment 1
[0038] A time-modulated amplitude-phase control system based on power cancellation provided by the present invention includes: a two-way power distribution network, a radio frequency switch, a radio frequency phase shifting module and a digital control module;
[0039] The two radio frequency switches are connected to the power distribution network; the two radio frequency switches are respectively connected to the two radio frequency phase shifting modules; the two radio frequency phase shifting modules are connected to the power distribution network; two The radio frequency switch is connected with the digital control module.
[0040] Specifically, the radio frequency switch includes a single pole multiple throw radio frequency switch or a single pole single throw radio frequency switch.
[0041] Specifically, the radio frequency phase shifting module includes a digital phase shifter or a fixed phase delay line.
[0042] Specifically, the fixed-phase delay lines include two...
Embodiment 2
[0058] Embodiment 2 is a modification of embodiment 1
[0059] like figure 1 As shown, in the implementation example, the time-modulated amplitude-phase control module based on power cancellation consists of 2 two-way power distribution networks (1-1), 2 single-pole single-throw radio frequency switches (1-2), 2 A fixed-phase delay line (1-3) with a phase difference of 180° (π), and a digital control module (1-4), the first two-way power distribution network is connected to two single-pole single-throw radio frequency Before switch (1-2). The two single-pole single-throw radio frequency switches (1-2) are independently connected to two fixed-phase delay lines (1-3). The 2 phase delay lines (1-3) are connected before the second two-way power distribution network. The two single-pole single-throw radio frequency switches (1-2) are periodically controlled by a digital control module (1-4). This module is simplified as the amplitude-phase control module based on power cancella...
example 1
[0062] Example 1: Fundamental Beam Pattern Synthesis
[0063] Suppose the number of array elements is N=16, and the carrier frequency of the radio frequency signal is f 0 =2GHz, the limit switching period of the switch is T c =50ns, the time resolution of the digital control module crystal oscillator is T Δ = 5ns. The synthesis method of the fundamental wave pattern is Chebyshev weighting with a side lobe of -40dB, and the maximum weighting ratio in different channels is ρ=1 / 0.11. According to the traditional amplitude and phase control method, since the limit switching time of the switch is limited by its physical characteristics, in order to ensure a reasonable weighting ratio of different channels, the duration of the maximum weighted channel should be T p =ρT c ≈455ns, at this time the modulation frequency of the system is f p =1 / T p ≈2.2MHz, for this system, its transmission bandwidth is also limited to B=2.2MHz. The use of time-modulated amplitude-phase control mo...
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