High-frequency millimeter wave digital isolator

Abstract

The utility model provides a high-frequency millimeter wave digital isolator, which comprises a transmitter, a receiver and an integrated isolation device, the integrated isolation device comprises a first millimeter wave antenna and a second millimeter wave antenna, and the first millimeter wave antenna and the second millimeter wave antenna are arranged on the same horizontal plane. An isolation belt is arranged between the first millimeter wave antenna and the second millimeter wave antenna, the first millimeter wave antenna is connected with the transmitter, the second millimeter wave antenna is connected with the receiver, and signals are transmitted between the transmitter and the receiver through the integrated isolation device. Signal transmission between the transmitter and the receiver is carried out by arranging the integrated isolation device, the integrated isolation device comprises the first millimeter wave antenna and the second millimeter wave antenna which are arranged on the same horizontal plane and provided with the isolation strip therebetween, and the isolation efficiency and the transmission efficiency can be ensured at the same time under the high-frequency condition. And the risk of open circuit caused by collapse is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of digital isolation, in particular to a high-frequency millimeter wave digital isolator. Background Art

[0002] Traditional digital isolators are usually designed with closely arranged inductors (such as planar spiral inductors) that are magnetically coupled to each other. When the frequency of the signal transmitted between two circuits in different voltage domains increases, either the distance between the inductors is kept small to maintain transmission efficiency but sacrifice isolation; or the distance is increased to maintain isolation but sacrifice transmission efficiency.

[0003] In addition, the existing magnetic couple has an up-and-down transmission structure. Under high pressure, the upper part may collapse and hit the lower part, causing a short circuit. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to provide a high-frequency millimeter-wave digital isolator that can maintain both isolation efficiency and transmission efficiency and will not cause a circuit break due to collapse.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0006] A high-frequency millimeter wave digital isolator comprises a transmitter, a receiver and an integrated isolation device, wherein the integrated isolation device comprises a first millimeter wave antenna and a second millimeter wave antenna, wherein the first millimeter wave antenna and the second millimeter wave antenna are arranged on the same horizontal plane, and an isolation zone is arranged between the first millimeter wave antenna and the second millimeter wave antenna, wherein the first millimeter wave antenna is connected to the transmitter, and the second millimeter wave antenna is connected to the receiver, and signals are transmitted between the transmitter and the receiver through the integrated isolation device.

[0007] Furthermore, the first millimeter wave antenna and the second millimeter wave antenna are arranged in parallel.

[0008] Furthermore, the transmitter includes a first matching network, and the first millimeter wave antenna is connected to the first matching network.

[0009] Furthermore, the transmitter also includes a voltage-controlled oscillator, an input buffer and a mixer, the input end of the mixer is respectively connected to the voltage-controlled oscillator and the input buffer, the output end of the mixer is connected to the input end of the first matching network, and the output end of the first matching network is connected to the first millimeter wave antenna.

[0010] Furthermore, the first matching network includes a first transformer, a first capacitor and a second capacitor, the first capacitor is connected in parallel to the primary side of the first transformer, the second capacitor is connected in parallel to the secondary side of the first transformer, the primary side of the first transformer is connected to the mixer, and the secondary side of the first transformer is connected to the first millimeter wave antenna.

[0011] Furthermore, the receiver includes a second matching network, and the second millimeter wave antenna is connected to the second matching network.

[0012] Furthermore, the receiver also includes an amplifier, a demodulator and an output buffer, and the second millimeter wave antenna, the second matching network, the amplifier, the demodulator and the output buffer are connected in sequence.

[0013] Furthermore, the second matching network includes a second transformer, a third capacitor and a fourth capacitor, the third capacitor is connected in parallel to the primary side of the second transformer, the fourth capacitor is connected in parallel to the secondary side of the second transformer, the primary side of the second transformer is connected to the second millimeter wave antenna, and the secondary side of the second transformer is connected to the amplifier.

[0014] The beneficial effect of the utility model is that the signal transmission between the transmitter and the receiver is performed by setting an integrated isolation device, and the integrated isolation device includes a first millimeter wave antenna and a second millimeter wave antenna arranged on the same horizontal plane and having an isolation zone between them, which can ensure isolation efficiency and transmission efficiency at high frequencies. And because the first millimeter wave antenna and the second millimeter wave antenna are arranged on the same horizontal plane, there is no risk of collapse and circuit breaking compared to the upper and lower structures of traditional magnetic dipoles. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a system schematic diagram of a high-frequency millimeter-wave digital isolator according to an embodiment of the utility model;

[0016] Figure 2 The figure shows the millimeter wave antenna structure of the high frequency millimeter wave digital isolator of the present utility model embodiment. Figure 1 ;

[0017] Figure 3 The figure shows the millimeter wave antenna structure of the high frequency millimeter wave digital isolator of the present utility model embodiment. Figure 2 ;

[0018] Figure 4 Shown is a system schematic diagram of a first matching network according to an embodiment of the present utility model;

[0019] Figure 5 Shown is a schematic diagram of an equivalent circuit of a first matching network according to an embodiment of the present utility model;

[0020] Figure 6The figure shows an equivalent circuit diagram of the first matching network of the embodiment of the utility model viewed from the primary side;

[0021] Figure 7 Shown is a system schematic diagram of a second matching network according to an embodiment of the present utility model.

[0022] Description of labels:

[0023] 1. Transmitter; 11. Voltage-controlled oscillator; 12. Input buffer; 13. Mixer; 14. First matching network; 2. Receiver; 21. Second matching network; 22. Amplifier; 23. Demodulator; 24. Output buffer; 3. Integrated isolation device; 31. First millimeter-wave antenna; 32. Second millimeter-wave antenna; 33. Isolation belt. DETAILED DESCRIPTION

[0024] In order to more clearly understand the technical content, achieved purposes and effects of the utility model, the utility model is described in detail below in combination with specific implementation methods and in conjunction with the accompanying drawings. It should be noted that the implementation methods of the utility model and the features in the implementation methods can be combined with each other without conflict. In the following description, many specific details are set forth in order to fully understand the utility model. The implementation methods described are only part of the implementation methods of the utility model, not all of the implementation methods. Based on the implementation methods in the utility model, all other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0025] Please refer to Figure 1-3 As shown, the technical solution provided by the utility model is:

[0026] A high-frequency millimeter wave digital isolator includes a transmitter and a receiver, and also includes an integrated isolation device, the integrated isolation device includes a first millimeter wave antenna and a second millimeter wave antenna, the first millimeter wave antenna and the second millimeter wave antenna are arranged on the same horizontal plane, and an isolation belt is arranged between the first millimeter wave antenna and the second millimeter wave antenna, the first millimeter wave antenna is connected to the transmitter, and the second millimeter wave antenna is connected to the receiver, and signals are transmitted between the transmitter and the receiver through the integrated isolation device.

[0027] Furthermore, the first millimeter wave antenna and the second millimeter wave antenna are arranged in parallel. The parallel arrangement of the millimeter wave antennas is a preferred arrangement of the present invention, which can achieve better transmission efficiency and isolation efficiency, as well as a smaller substrate occupation area.

[0028] Furthermore, the transmitter includes a first matching network, and the first millimeter wave antenna is connected to the first matching network. The first matching network can be configured to match the output impedance of the transmitter with the input impedance of the integrated isolation device. The first matching network can also be configured to eliminate parasitic effects between the input pad, the transmitter, the integrated isolation device, etc., and by setting a reasonable quality factor of the first matching network, a flat bandpass is formed between the transmitter and the first millimeter wave antenna to reduce jitter.

[0029] Furthermore, the transmitter also includes a voltage-controlled oscillator, an input buffer and a mixer, the input end of the mixer is respectively connected to the voltage-controlled oscillator and the input buffer, the output end of the mixer is connected to the input end of the first matching network, and the output end of the first matching network is connected to the first millimeter wave antenna.

[0030] Furthermore, the first matching network includes a first transformer, a first capacitor and a second capacitor, the first capacitor is connected in parallel to the primary side of the first transformer, the second capacitor is connected in parallel to the secondary side of the first transformer, the primary side of the first transformer is connected to the mixer, and the secondary side of the first transformer is connected to the first millimeter wave antenna.

[0031] Furthermore, the receiver includes a second matching network, and the second millimeter wave antenna is connected to the second matching network.

[0032] Furthermore, the receiver also includes an amplifier, a demodulator and an output buffer, and the second millimeter wave antenna, the second matching network, the amplifier, the demodulator and the output buffer are connected in sequence.

[0033] Furthermore, the second matching network includes a second transformer, a third capacitor and a fourth capacitor, the third capacitor is connected in parallel to the primary side of the second transformer, the fourth capacitor is connected in parallel to the secondary side of the second transformer, the primary side of the second transformer is connected to the second millimeter wave antenna, and the secondary side of the second transformer is connected to the amplifier.

[0034] The following are specific embodiments.

[0035] Please refer to Figure 1-3 A high-frequency millimeter-wave digital isolator includes a transmitter 1, a receiver 2, and an integrated isolation device 3. Signals are transmitted between the transmitter 1 and the receiver 2 through the integrated isolation device 3. The integrated isolation device 3 provides galvanic isolation between the transmitter and the receiver, and the galvanic isolation can operate under different power supply voltages and / or different voltage domains.

[0036] The transmitter 1 can receive signals of various formats, such as digital data modulated by on-off keying (OOK). Specifically, the transmitter 1 includes a voltage-controlled oscillator 11, an input buffer 12, a mixer 13 and a first matching network 14, the input end of the mixer 13 is respectively connected to the voltage-controlled oscillator 11 and the input buffer 12, and the output end of the mixer 13 is connected to the input end of the first matching network 14. Through the input buffer, the received signal is provided to the mixer in a timely manner. The mixer is configured to tune the frequency of the received signal based at least in part on a clock signal (e.g., 30 GHz) from the voltage-controlled oscillator. The first matching network is configured to match the output impedance of the transmitter with the input impedance of the integrated isolation device, and to eliminate parasitic effects between the transmitter, the integrated isolation device, etc., and the quality factor of the first matching network is set to form a flat bandpass between the transmitter and the first millimeter wave antenna to reduce jitter.

[0037] The receiver 2 includes a second matching network 21, an amplifier 22, a demodulator 23 and an output buffer 24, which are connected in sequence.

[0038] The integrated isolation device 3 includes a first millimeter wave antenna 31 and a second millimeter wave antenna 32, wherein the first millimeter wave antenna 31 and the second millimeter wave antenna 32 are arranged on the same horizontal plane and are placed in parallel. Figure 2 and 3 Shown are schematic diagrams of the structure of the millimeter wave antenna from different perspectives.

[0039] An isolation zone 33 is provided between the first millimeter wave antenna 31 and the second millimeter wave antenna 32. The first millimeter wave antenna 31 is connected to the output end of the first matching network 14, and the second millimeter wave antenna 32 is connected to the input end of the second matching network 21. Figure 1 shown.

[0040] In a specific embodiment, the first matching network is composed of a first transformer T1, a first capacitor C out and the second capacitor C L The first capacitor C out Connected in parallel to the primary side of the first transformer T1, the second capacitor C L The first transformer T1 is connected in parallel to the secondary side of the first transformer T1, the primary side of the first transformer T1 is connected to the mixer 13, and the secondary side of the first transformer T1 is connected to the first millimeter wave antenna 31. Figure 4 The first capacitor C out It can be regarded as the output parasitic capacitance of the mixer or its output parasitic capacitance transformer in parallel with the external capacitance, depending on the size of the mixer and the operating frequency. Transformer T1 can be regarded as an ideal transformer T0 in parallel with an inductive inductor L m(magnetizing inductor) and a leakage inductor L in series k (leakage inductor), the turn ratio of the ideal transformer is n, the coupling coefficient is k, and the equivalent circuit diagram of the first matching network is as follows: Figure 5 As shown. Looking from the primary side, the load R L is converted to R L / (n / k) 2 , capacitor C L Converted to C L ×(n / k) 2 ,like Figure 6 FIG. 1 is a schematic diagram of an equivalent circuit of the first matching network viewed from the primary side. Therefore, the matching network can be used as a fourth-order band-pass filter.

[0041] In another specific embodiment, the second matching network is composed of a second transformer T2, a third capacitor and a fourth capacitor, the third capacitor is connected in parallel to the primary side of the second transformer T2, the fourth capacitor is connected in parallel to the secondary side of the second transformer T2, the primary side of the second transformer T2 is connected to the second millimeter wave antenna 32, and the secondary side of the second transformer T2 is connected to the amplifier 22. Figure 7 The principle of the second matching network is the same as that of the first matching network, and will not be described in detail here.

[0042] In summary, the high-frequency millimeter wave digital isolator of the utility model can ensure high transmission efficiency and high isolation efficiency at the same time. The two millimeter wave antennas are arranged in parallel on the same horizontal plane, which can effectively avoid the risk of collapse and circuit breaking. In addition, the two millimeter wave antennas use near-field transmission, so the loss is small, and they can also effectively resist the interference of instantaneous changes in common mode voltage.

[0043] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Therefore, any modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A high-frequency millimeter-wave digital isolator, comprising a transmitter and a receiver, characterized in that: It also includes an integrated isolation device, which includes a first millimeter wave antenna and a second millimeter wave antenna, the first millimeter wave antenna and the second millimeter wave antenna are arranged on the same horizontal plane, and an isolation zone is provided between the first millimeter wave antenna and the second millimeter wave antenna, the first millimeter wave antenna is connected to a transmitter, and the second millimeter wave antenna is connected to a receiver, and signals are transmitted between the transmitter and the receiver through the integrated isolation device.

2. The high-frequency millimeter-wave digital isolator according to claim 1, characterized in that: The first millimeter wave antenna and the second millimeter wave antenna are arranged in parallel.

3. The high-frequency millimeter wave digital isolator according to claim 1, characterized in that: The transmitter includes a first matching network, and the first millimeter wave antenna is connected to the first matching network.

4. The high-frequency millimeter wave digital isolator according to claim 3, characterized in that: The transmitter also includes a voltage-controlled oscillator, an input buffer and a mixer, the input end of the mixer is respectively connected to the voltage-controlled oscillator and the input buffer, the output end of the mixer is connected to the input end of the first matching network, and the output end of the first matching network is connected to the first millimeter wave antenna.

5. The high-frequency millimeter wave digital isolator according to claim 4, characterized in that: The first matching network includes a first transformer, a first capacitor and a second capacitor. The first capacitor is connected in parallel to the primary side of the first transformer, the second capacitor is connected in parallel to the secondary side of the first transformer, the primary side of the first transformer is connected to the mixer, and the secondary side of the first transformer is connected to the first millimeter wave antenna.

6. The high-frequency millimeter-wave digital isolator according to claim 1, characterized in that: The receiver includes a second matching network, and the second millimeter wave antenna is connected to the second matching network.

7. The high-frequency millimeter wave digital isolator according to claim 6, characterized in that: The receiver also includes an amplifier, a demodulator and an output buffer, and the second millimeter wave antenna, the second matching network, the amplifier, the demodulator and the output buffer are connected in sequence.

8. The high-frequency millimeter wave digital isolator according to claim 7, characterized in that: The second matching network includes a second transformer, a third capacitor and a fourth capacitor. The third capacitor is connected in parallel to the primary side of the second transformer, the fourth capacitor is connected in parallel to the secondary side of the second transformer, the primary side of the second transformer is connected to the second millimeter wave antenna, and the secondary side of the second transformer is connected to the amplifier.

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