High-isolation absorption type single-pole eight-throw switch module
By designing a 0.5-18GHz ultra-wideband high-isolated absorption single-pole eight-throw switch module, using square structure and high-performance components, the problem of low insertion loss and high isolation in the existing technology during high-frequency operation is solved, and excellent performance and wide application scenarios are achieved in the ultra-wideband frequency range.
Patent Information
- Application Number
- CN202421346408.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-21
- Estimated Expiration
- 2034-06-13
AI Technical Summary
The existing RF switch modules are difficult to achieve both low insertion loss and high isolation during high frequency operation, and their performance is unstable in the ultra-wideband frequency range, limiting their use in high-end RF applications.
A 0.5-18GHz ultra-wideband high-isolated absorption single-pole eight-throw switch module is designed, and each output branch has the same length. It uses a high-performance direct-blocking capacitor and PIN diode as switching elements to achieve rapid switching of signal paths by controlling forward and reverse bias.
It achieves excellent isolation and low insertion loss in the ultra-wideband frequency range. It is suitable for high-performance radio frequency and microwave systems, and meets the requirements of multiple performance indicators, including insertion loss, standing wave ratio, linear IP0.1, amplitude phase consistency and switching time.
Smart Images
Figure CN222655161U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of radio frequency switches, in particular to a high-isolation absorption type single-pole eight-throw switch module. Background Art
[0002] The single-pole multi-throw switch is an important component of the control circuit in the microwave system. It controls the frequency conversion of microwave signals and is mainly used in electronic countermeasures, phased array radar, microwave communication and microwave measurement.
[0003] In principle, the switch circuit is divided into two structures: absorption type and reflection type. The reflection type switch has the characteristics of small loss in the on state, but has the disadvantage of large reflection coefficient in the off state; while the absorption type switch has the characteristics of small reflection coefficient in the off state, so it can ensure the stability of the system and improve the reliability of the system. In many cases, the reflection type switch cannot be replaced, but the absorption type switch sacrifices loss and bandwidth. In radar and communication systems, a single-pole multi-throw switch circuit with high isolation and large power capacity is often required.
[0004] In the prior art, RF switch modules often face the challenge of achieving both low insertion loss and high isolation when operating at high frequencies. In addition, the performance of existing switch modules is often unstable within the ultra-wideband frequency range, limiting their use in high-end RF applications. Utility Model Content
[0005] The utility model provides a 0.5-18GHz ultra-wideband high-isolation absorptive single-pole eight-throw switch module, which provides excellent isolation and low insertion loss within the ultra-wideband frequency range.
[0006] In order to achieve the purpose of the utility model, the technical solution adopted is: a high-isolation absorption single-pole eight-throw switch module, including a shell, a feed control board, a printed board, a power port, an input port and an output port, the printed board and the feed control board are configured inside the shell, the input port and the power port are arranged on the front panel, and the output ports are distributed at equal intervals on the back of the shell. A single-pole double-throw switch and two single-pole four-throw switches are arranged on the printed board, and the two single-pole four-throw switches are connected to the fixed end of the single-pole double-throw switch.
[0007] As an optimization solution of the utility model, the high-isolation absorption single-pole eight-throw switch module adopts a square structure design, and the length of each output branch line is consistent.
[0008] As an optimized solution of the utility model, the high-isolation absorption single-pole eight-throw switch module includes two output branches.
[0009] As an optimization solution of the utility model, the high-isolation absorptive single-pole eight-throw switch module is an absorptive single-pole eight-throw switch with an operating frequency band of 0.5-18 GHz.
[0010] As an optimization solution of the utility model, a single-pole double-throw switch includes a first DC blocking capacitor, a first inductor and a single-pole double-throw chip. Starting from the input port, the first DC blocking capacitor is connected to the first inductor and the single-pole double-throw chip respectively, the other end of the first inductor is grounded, and the two ends of the single-pole double-throw chip are divided into two mirror-image branches.
[0011] As an optimization solution of the utility model, a branch of a single-pole double-throw chip includes a second inductor, a third inductor, a single-pole four-throw chip, a first PIN diode, a second PIN diode, a third PIN diode, a first resistor, a fourth inductor and a second DC-blocking capacitor. The second inductor and the third inductor are both connected to one end of the single-pole four-throw chip, the other end of the second inductor is connected to the feed board, the other end of the third inductor is grounded through a gold wire, the other end of the single-pole four-throw chip is connected in series with the first PIN diode and the second PIN diode in sequence, the other end of the second PIN diode is connected in series with the third PIN diode connected in parallel with the first resistor, the other end of the third PIN diode is respectively connected to the fourth inductor and the second DC-blocking capacitor, the other end of the fourth inductor is connected to the feed board, and the second DC-blocking capacitor is connected to the output port.
[0012] The utility model has positive effects: 1) the utility model can provide high isolation while maintaining low insertion loss, and is suitable for high-performance radio frequency and microwave systems;
[0013] 2) The utility model meets the following indicators: insertion loss: ≤5.5dB; input and output standing wave: ≤2; linear IP0.1: 25dBm; amplitude consistency between single branches: ≤±0.5dB; phase consistency between single branches: ≤±10°; amplitude consistency between different individuals: ≤±0.5dB; phase consistency between different individuals: ≤±15°; switching time: ≤70nS; isolation: ≥70dB. It has a wide range of application scenarios.
[0014] 3) The utility model adopts a square structure design in the structural layout, and the length of each branch line is consistent, achieving a high amplitude consistency;
[0015] 4) The utility model adopts high-performance DC-blocking capacitors, which have good isolation;
[0016] 5) The utility model uses a PIN diode as a switching element, and realizes rapid switching of the signal path by controlling the forward and reverse biases, and the switching speed is fast. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] The utility model is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.
[0018] Figure 1 It is a schematic diagram of a 0.5-18GHz ultra-wideband high-isolation absorptive single-pole eight-throw switch module of the utility model. DETAILED DESCRIPTION
[0019] like Figure 1 As shown, the utility model discloses a high-isolation absorption single-pole eight-throw switch module, including a shell, a feed control board, a printed circuit board, a power port, an input port and an output port, the printed circuit board and the feed control board are configured inside the shell, the input port and the power port are arranged on the front panel, the output ports are distributed at equal intervals on the back of the shell, one single-pole double-throw switch and two single-pole four-throw switches are arranged on the printed circuit board, and the two single-pole four-throw switches are connected to the fixed end of the single-pole double-throw switch.
[0020] The high isolation absorptive single-pole eight-throw switch module adopts a square structure design, and the length of each output branch line is consistent. The microstrip line design is combined with high-performance absorption materials to optimize the signal transmission path and reduce the loss in the on state. The installation positioning holes are distributed in a square shape around the module.
[0021] The high isolation absorptive single-pole eight-throw switch module includes two output branches.
[0022] The high isolation absorptive single-pole eight-throw switch module is an absorptive single-pole eight-throw switch with an operating frequency band of 0.5-18GHz.
[0023] The single-pole double-throw switch includes a first DC blocking capacitor, a first inductor and a single-pole double-throw chip. Starting from the input port, the first DC blocking capacitor is connected to the first inductor and the single-pole double-throw chip respectively. The other end of the first inductor is grounded, and the two ends of the single-pole double-throw chip are divided into two mirror-image branches.
[0024] A branch of the single-pole double-throw chip includes a second inductor, a third inductor, a single-pole four-throw chip, a first PIN diode, a second PIN diode, a third PIN diode, a first resistor, a fourth inductor and a second DC-blocking capacitor. The second inductor and the third inductor are both connected to one end of the single-pole four-throw chip, the other end of the second inductor is connected to the feed board, the other end of the third inductor is grounded through a gold wire, the other end of the single-pole four-throw chip is connected in series with the first PIN diode and the second PIN diode in sequence, the other end of the second PIN diode is connected in series with the third PIN diode connected in parallel with the first resistor, the other end of the third PIN diode is respectively connected to the fourth inductor and the second DC-blocking capacitor, the other end of the fourth inductor is connected to the feed board, and the second DC-blocking capacitor is connected to the output port. The first resistor is a 50Ω resistor.
[0025] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A high isolation absorptive single-pole eight-throw switch module, characterized in that: The invention comprises a shell, a feed control board, a printed circuit board, a power port, an input port and an output port. The printed circuit board and the feed control board are arranged inside the shell, the input port and the power port are arranged on the front panel, and the output ports are distributed at equal intervals on the back of the shell. A single-pole double-throw switch and two single-pole four-throw switches are arranged on the printed circuit board, and the two single-pole four-throw switches are connected to the fixed end of the single-pole double-throw switch.
2. A high isolation absorptive single-pole eight-throw switch module according to claim 1, characterized in that: The high isolation absorptive single-pole eight-throw switch module adopts a square structure design, and the length of each output branch line is consistent.
3. A high isolation absorptive single-pole eight-throw switch module according to claim 2, characterized in that: The high isolation absorptive single-pole eight-throw switch module includes two output branches.
4. The high isolation absorptive single-pole eight-throw switch module according to claim 3, characterized in that: The high isolation absorptive single-pole eight-throw switch module is an absorptive single-pole eight-throw switch with an operating frequency band of 0.5-18GHz.
5. The high isolation absorptive single-pole eight-throw switch module according to claim 4, characterized in that: The single-pole double-throw switch includes a first DC blocking capacitor, a first inductor and a single-pole double-throw chip. Starting from the input port, the first DC blocking capacitor is connected to the first inductor and the single-pole double-throw chip respectively. The other end of the first inductor is grounded, and the two ends of the single-pole double-throw chip are divided into two mirror-image branches.
6. The high isolation absorptive single-pole eight-throw switch module according to claim 5, characterized in that: A branch of the single-pole double-throw chip includes a second inductor, a third inductor, a single-pole four-throw chip, a first PIN diode, a second PIN diode, a third PIN diode, a first resistor, a fourth inductor and a second DC-blocking capacitor. The second inductor and the third inductor are both connected to one end of the single-pole four-throw chip, the other end of the second inductor is connected to the feed board, the other end of the third inductor is grounded through a gold wire, the other end of the single-pole four-throw chip is connected in series with the first PIN diode and the second PIN diode in sequence, the other end of the second PIN diode is connected in series with the third PIN diode connected in parallel with the first resistor, the other end of the third PIN diode is respectively connected to the fourth inductor and the second DC-blocking capacitor, the other end of the fourth inductor is connected to the feed board, and the second DC-blocking capacitor is connected to the output port.