Time Modulation Amplitude and Phase Control System, Method and Control Method Based on Power Cancellation
A time modulation, amplitude and phase control technology, applied in antennas, electrical components and other directions, can solve problems such as reduction, and achieve the effect of broadening the bandwidth of use
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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] Such as 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 cance...
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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