Phase shift circuit, antenna device and signal processor
A phase-shifting circuit and antenna device technology, applied in the field of communication, can solve the problems of circularly polarized antenna axial ratio, gain and delay, etc. The effect of low cost, wide effective bandwidth, and strong anti-interference ability
Pending Publication Date: 2020-02-04
GUANGZHOU HI TARGET NAVIGATION TECH
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Problems solved by technology
[0004] However, during the implementation process, the inventors found that there are at least the following problems in the traditional technology: the current phase-shifting network wiring rules are strict, and the wiring area of the printed board is required to be large enough. If the traditional phase-shifting network is applied to miniaturization When using an antenna, the coupling crosstalk between the microstrip traces is serious, and the anti-interference ability is poor, which will easily have a negative impact on the axial ratio, gain and delay performance of the circularly polarized antenna.
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[0047] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. A preferred embodiment of the application is shown in the drawings. However, the present application can be embodied in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.
[0048] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to and integrally integrated with the other element, or there may be an intervening element at the same time. The terms "input", "output", "one end", "other end" and similar expressions are used herein for the purpose of description only.
[0049] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as c...
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The invention relates to a phase shift circuit, an antenna device and a signal processor. The phase shift circuit is characterized in that a first input end of a first inductance bridge receives a first radio frequency signal, a second input end receives a second radio frequency signal, and a first output end is connected with a first input end of a 180-degree phase shift unit; the first input endof the second inductance bridge receives a third radio frequency signal, the second input end of the second inductance bridge receives a fourth radio frequency signal, and the first output end of thesecond inductance bridge is connected with the second input end of the 180-degree phase shift unit; and the output end of the 180-degree phase shift unit outputs a circularly polarized radio frequency signal. According to the technical scheme of the invention, the effective bandwidth is wide. Small phase deviation and flat in-band phase in GNSS broadband can be realized; the printed circuit boardhas the advantages of small insertion loss, small size, low cost, high transportability, easiness in debugging and the like, so that the signal quality in a limited printed circuit board wiring areacan be ensured to be better, high anti-interference capability is realized. The miniaturization design requirements of an antenna device, a navigation terminal or terminal equipment can be met.
Description
technical field [0001] The present application relates to the technical field of communication, in particular to a phase shifting circuit, an antenna device and a signal processor. Background technique [0002] With the development of high-precision global satellite navigation and positioning systems, the high-precision measurement antennas equipped on terminal equipment of satellite navigation and positioning systems are generally circularly polarized antennas. Since circularly polarized antennas can receive any planned incoming wave and have rotation orthogonality, circularly polarized antennas have important applications in communications, radar, electronic countermeasures, and GNSS (Global Navigation Satellite System, Global Navigation Satellite System). [0003] The circularly polarized antenna generally cooperates with the phase-shifting network to combine or decompose the circularly polarized signal, while the traditional phase-shifting network usually consists of a 9...
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Login to View More IPC IPC(8): H03H11/16
CPCH03H11/16
Inventor 李晓鹏陈影朱勇安张华福唐长虹邓良有
Owner GUANGZHOU HI TARGET NAVIGATION TECH