A 10-20GHz fast source-local oscillator module
By combining multipath mixing and frequency doubling architecture with DDS module, the problems of discontinuous coverage and coarse frequency adjustment in the 10-20GHz band in the existing technology are solved, and high-precision frequency synthesis is achieved, which is suitable for modern radar and 5G communication.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGSU SHENGJIA MICROELECTRONICS TECH CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-30
AI Technical Summary
Existing technologies are insufficient to achieve continuous output across a wide frequency band of 10-20 GHz and precise frequency control below MHz, thus failing to meet the needs of modern radar and 5G communication.
A multi-path mixing and frequency multiplication architecture is adopted, combined with a DDS module to achieve frequency adjustment. Through comb spectrum frequency division and mixing design, multi-band seamless output is generated, and a DDS module is introduced for fine adjustment at the 0.4-0.6GHz level to improve the signal frequency step accuracy.
It achieves seamless multi-band output from 10 to 20 GHz and frequency step accuracy below 1 MHz, adapting to the dense allocation requirements of spectrum resources in complex scenarios.
Smart Images
Figure CN224438974U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of microwave communication, and in particular to a 10-20GHz fast source local oscillator module. Background Technology
[0002] In the field of frequency synthesis technology, existing solutions have significant limitations. First, they suffer from narrow frequency band coverage. Traditional single-channel architectures or simple frequency multiplication schemes struggle to achieve continuous output across a wide frequency band of 10-20 GHz, generally exhibiting issues such as missing high-frequency signals and discontinuous coverage, failing to meet the broadband signal requirements of modern radar and 5G communications. Second, their frequency tuning is coarse, relying heavily on phase-locked loop (PLL) technology with frequency steps mostly at the kHz level, unable to achieve fine control below MHz, and ill-suited for scenarios with densely allocated spectrum resources, resulting in insufficient signal accuracy. Utility Model Content
[0003] The purpose of this invention is to provide a 10-20GHz fast source-local oscillator module with seamless multi-band output and high adjustment accuracy.
[0004] The purpose of this invention is achieved as follows: a 10-20GHz fast source local oscillator module, including a reference source module; the reference source module is used to generate a 100MHz reference frequency;
[0005] The 100MHz reference frequency is divided by the first comb spectrum to obtain 1GHz branch, 4GHz branch, and 2.6 / 2.8 / 3 / 3.2 / 3.4GHz branches; the 1GHz branch is divided by the second comb spectrum to obtain 3 / 4 / 5 / 6 / 7GHz branches and 20GHz branch;
[0006] The 4GHz frequency is input to the DDS module, and the DDS module outputs an adjustable frequency of 0.4-0.6GHz, which is then mixed with branches of 2.6 / 2.8 / 3 / 3.2 / 3.4GHz to generate a frequency of 2-3GHz.
[0007] The 2-3GHz frequency is mixed with the 20GHz high local oscillator frequency, and then mixed with the 3 / 4 / 5 / 6 / 7GHz branches by the filter switch group before being output.
[0008] Preferably, the 20GHz branch is a 5GHz frequency processed by a 4-fold frequency multiplier to generate a 20GHz high local oscillator frequency.
[0009] Preferably, the filter switch group consists of a two-stage single-pole double-throw switch, a 17-18GHz filter, and a 22-26GHz filter. After the signal passes through the single-pole double-throw switch, it is output in two groups. The signals are then divided into two frequency segments by the 17-18GHz filter and the 22-26GHz filter, respectively, and then combined into a single signal output by the single-pole double-throw switch.
[0010] Preferably, the DDS module outputs a frequency adjustment step size ≤ 1MHz.
[0011] Preferably, the switching time of the single-pole double-throw switch is ≤0.5µs.
[0012] Compared with the prior art, the advantages of this utility model are:
[0013] 1. Through multi-path mixing and frequency multiplication architecture, it achieves seamless output of multiple frequency bands from 10 to 20 GHz, which greatly improves the coverage compared to single-channel or narrowband solutions, and is suitable for complex scenarios such as radar and 5G communication.
[0014] 2. The introduction of the DDS module enables fine-tuning at the 0.4-0.6GHz level. Combined with comb spectrum and mixing design, the frequency step accuracy of the synthesized signal is improved to below 1MHz, meeting the requirements for dense allocation of spectrum resources. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the principle of this utility model. Detailed Implementation
[0016] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.
[0017] It should be noted that in the description of this utility model, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. These terms are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance. The terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component must be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.
[0018] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0019] like Figure 1 As shown, a 10-20GHz fast source local oscillator module includes a reference source module; the reference source module is used to generate a 100MHz reference frequency.
[0020] The 100MHz reference frequency is divided by the first comb spectrum to obtain 1GHz branch, 4GHz branch, and 2.6 / 2.8 / 3 / 3.2 / 3.4GHz branches; the 1GHz branch is divided by the second comb spectrum to obtain 3 / 4 / 5 / 6 / 7GHz branches and 20GHz branch;
[0021] The 4GHz frequency is input to the DDS module, and the DDS module outputs an adjustable frequency of 0.4-0.6GHz, which is then mixed with the 2.6 / 2.8 / 3 / 3.2 / 3.4GHz branches to generate a 2-3GHz frequency.
[0022] The 2-3GHz frequency is mixed with the 20GHz high local oscillator frequency, and then mixed with the 3 / 4 / 5 / 6 / 7GHz branches by the filter switch group before being output.
[0023] like Figure 1 As shown, the 20GHz branch is a 5GHz frequency that is processed by a 4-fold frequency multiplier to generate a 20GHz high local oscillator frequency.
[0024] like Figure 1 As shown, the filter switch group consists of two-stage single-pole double-throw switches, a 17-18GHz filter, and a 22-26GHz filter. After the signal passes through the single-pole double-throw switch, it is output in two groups. After passing through the 17-18GHz filter and the 22-26GHz filter, the signal is divided into two frequency segments. After passing through the single-pole double-throw switch, the signals are combined into one output signal.
[0025] like Figure 1 As shown, the DDS module output frequency adjustment step size is ≤1MHz, and the DDS module adopts the AD9850 model with a frequency resolution of ≤0.1MHz.
[0026] like Figure 1 As shown, the switching time of the single-pole double-throw switch is ≤0.5us. The HMC349LP3E single-pole double-throw switch is adopted to meet the requirements of sudden signal scenarios.
[0027] The working principle of this invention is explained as follows: During operation, a 100MHz reference signal is frequency-divided by the first comb spectrum module to generate multiple branch signals such as 1GHz and 4GHz; the 1GHz signal is expanded into multiple frequency components by the second comb spectrum; the 4GHz signal is mixed with the 0.4-0.6GHz adjustable signal output from the DDS module and with fixed frequency signals of 2.6 / 2.8 / 3 / 3.2 / 3.4GHz to output a 2-3GHz frequency band signal; simultaneously, the 5GHz signal is multiplied by 4 to generate a 20GHz high local oscillator, and after being mixed with the 2-3GHz signal and the 20GHz local oscillator, it passes through a filter switch group and is then mixed a second time with the 3 / 4 / 5 / 6 / 7GHz signals output from the second comb spectrum, and finally synthesized into a 10-20GHz target signal by a mixer. This achieves wide-band, high-precision frequency synthesis.
[0028] The technical specifications of this utility model are as follows:
[0029] a) Output local oscillator frequency: 10~20GHz (1 output channel);
[0030] b) Output local oscillator frequency step: 0.5MHz;
[0031] c) Maximum power of local oscillator output signal: ≥3dBm;
[0032] d) Local oscillator output signal spurious signals: better than -60dBc;
[0033] e) Local oscillator output phase noise: ≤-90dBc / Hz@1kHz
[0034] f) Frequency switching time: better than 0.5µs;
[0035] g) Frequency accuracy: ≤ ±0.1ppm.
[0036] All of the components described above are existing technologies, and those skilled in the art can use any model and existing design that can achieve their corresponding functions.
[0037] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the concept and scope of the present invention. Various modifications and improvements made to the technical solutions of the present invention by those skilled in the art without departing from the design concept of the present invention should fall within the protection scope of the present invention. The technical content for which protection is sought in the present invention has been fully described in the claims.
Claims
1. A 10-20GHz fast source-local oscillator module, characterized in that, Includes a reference source module; the reference source module is used to generate a 100MHz reference frequency; The 100MHz reference frequency is divided by the first comb spectrum to obtain 1GHz branch, 4GHz branch, and 2.6 / 2.8 / 3 / 3.2 / 3.4GHz branches; the 1GHz branch is divided by the second comb spectrum to obtain 3 / 4 / 5 / 6 / 7GHz branches and 20GHz branch; The 4GHz frequency is input to the DDS module, and the DDS module outputs an adjustable frequency of 0.4-0.6GHz, which is then mixed with branches of 2.6 / 2.8 / 3 / 3.2 / 3.4GHz to generate a frequency of 2-3GHz. The 2-3GHz frequency is mixed with the 20GHz high local oscillator frequency, and then mixed with the 3 / 4 / 5 / 6 / 7GHz branches by the filter switch group before being output.
2. A 10-20GHz fast source-local oscillator module according to claim 1, characterized in that, The 20GHz branch is generated by processing the 5GHz frequency with a 4-fold frequency multiplier to produce a 20GHz high local oscillator frequency.
3. A 10-20GHz fast source-local oscillator module according to claim 1, characterized in that, The filter switch group consists of a two-stage single-pole double-throw switch, a 17-18GHz filter, and a 22-26GHz filter. After the signal passes through the single-pole double-throw switch, it is output in two groups. The signals are then separated into two frequency segments by the 17-18GHz filter and the 22-26GHz filter, respectively, and then combined into a single signal output by the single-pole double-throw switch.
4. A 10-20GHz fast source-local oscillator module according to claim 1, characterized in that, The DDS module outputs a frequency adjustment step of ≤1MHz.
5. A 10-20GHz fast source-local oscillator module according to claim 1, characterized in that, The switching time of the single-pole double-throw switch is ≤0.5us.