Four-path orthogonal signal generator based on E-type resonators

Abstract

The invention discloses a four-path orthogonal signal generator based on E-type resonators, which comprises a dielectric plate (2), a metal floor (1) positioned on the lower surface of the dielectric plate, an input port feeder line (3) positioned on the upper surface of the dielectric plate, a second output port feeder line (4), a third output port feeder line (5), a fourth output port feeder line (6), a fifth output port feeder line (7), a first E-type resonator (8) and a second E-type resonator (9). Each of the first E-type resonator and the second E-type resonator comprises a half-wavelength resonator (81, 91) and a symmetry plane branch knot loading unit (82, 92). One end of the fourth output port feeder line (6) is connected with the metal floor (1) through a metal through hole (10) penetrating through the dielectric plate (2), and one end of the fifth output port feeder line (7) is connected with the metal floor (1) through a metal through hole (11) penetrating through the dielectric plate (2). The device is compact in structure, small in phase deviation, low in loss, low in cost and suitable for a modern wireless communication system.

Description

technical field [0001] The invention relates to the technical field of microwave passive devices, in particular to a four-way orthogonal signal generator based on an E-type resonator. Background technique [0002] In recent years, with the development of modern wireless communication technology, orthogonal signals are widely used in wireless communication equipment in various fields. For example, in the field of antennas, circularly polarized antennas sometimes require orthogonal signals to feed them. Therefore, low cost, compact structure, low loss, and small phase deviation have become very important considerations in the design of quadrature signal generators. In order to achieve these design goals, how to generate quadrature signals has become a research hotspot at home and abroad. At present, the most common signal transmission line in microwave integrated circuits is microstrip line, which has the characteristics of small size, easy integration, easy application, and ...

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Problems solved by technology

[0003] Document 1 (T.Kusaga and T.Shima, "Four-stage ring oscillator for quadraturesignal generation," in Proc.Int.Conf.Signals Electron.Syst., Sep.2008, pp.89–92.) proposed two A quadrature oscillator circuit based on a tetrahedral oscillator can generate quadrature signals, but it is an active technology with high power consumption and relatively large phase noise influence

[0004] Literature 2 (H.Ren, B.Arigong, M.Zhou, J.Ding, and H.Zhang, "A novel design of 4×4butler matrix with relatively flexible phase differences," IEEE AntennasWireless Propag. Lett., vol.15 , pp.1277–1280,2016.) Various phase signals, including quadrature signals, can be generated through the Butler matrix, which is a passive technology with low power consumption, but the structure is complex and the size is large, which is not convenient for application

[0005] Document 3 (Mohammad, Abu, Khater, "Quadrature Phase Generation Using a RingResonator," IEEE Microw.Wireless Compon. Lett., vol.29, no.1, pp.26–28, Jan.2019.) utilizes ring resonators The coupling of the electric field and the magnetic field under the fundamental mode produces four quadrature signals. The method is novel, but it is a single mode with narrow passband and large difference in output signal amplitude.

[0006] It can be seen from the above that the problems existing in the existing technology are: the design structure is complex, not compact, and it is not easy to process and integrate; the loss is large; the passband is narrow and the amplitude difference is large, which is not suitable for some modern wireless communication systems

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