Single-cavity surface integrated dielectric wave trap
By integrating metal transmission lines and coupling capacitors onto the dielectric resonator body, the problems of large size and high production cost of dielectric notch filters are solved, realizing the miniaturization and low-cost automated production of dielectric notch filters.
Patent Information
- Application Number
- CN202520267536.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-19
- Publication Date
- 2026-01-23
- Estimated Expiration
- 2035-02-19
AI Technical Summary
Existing dielectric notch filters are large in size, have high production costs, and low production efficiency because they require additional independent capacitors and transmission lines.
Metal transmission lines and coupling capacitors are integrated onto the dielectric resonator body using screen printing and laser engraving technologies, eliminating the need for separate capacitors and transmission lines and achieving an integrated design.
It has achieved miniaturization and cost reduction of dielectric notch filters, supports automated mass production, and reduces debugging workload and production costs.
Smart Images
Figure CN223828694U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to microwave component technology field, concretely relates to a single cavity surface integrated dielectric wave trap. BACKGROUND
[0002] Dielectric wave trap is combined into microwave element by single or multiple resonators through certain coupling structure and transmission structure.
[0003] The commonly used dielectric wave trap usually realizes by splicing single resonator, resonator and resonator are connected through transmission line, and the length of transmission line is usually one quarter wavelength. Figure 1 As shown in the structural diagram. Figure 1 P1, P2 are input and output ports. L1, L2 …… LN, LN+1 are transmission lines between resonators. R1, R2 …… RN, RN+1 are single dielectric resonators. C1, C2 …… CN, CN+1 are coupling capacitors between resonators and transmission lines.
[0004] The defect in the prior art is that independent capacitors C1, C2 …… CN, CN+1 and independent transmission lines L1, L2 …… LN, LN+1 need to be additionally introduced, which increases the volume of the wave trap and is not conducive to the miniaturization of the wave trap.
[0005] The additional independent capacitors and independent transmission lines need to be manually welded by skilled assembly personnel, and the introduced capacitors and transmission lines need to be debugged again due to the limitation of manual welding precision; the debugging work can only be completed by professional technicians, which leads to high personnel cost and low production efficiency during production. UTILITY MODEL CONTENTS
[0006] To solve the problems in the background art, the utility model provides a single cavity surface integrated dielectric wave trap, which realizes the miniaturization, low cost and automatic production of the dielectric wave trap.
[0007] To solve the above problems, the utility model adopts the following technical scheme: a single cavity surface integrated dielectric wave trap, comprising a dielectric resonator body, the end surface of the dielectric resonator body is formed with a planar space, the planar space is integrally provided with a metal transmission line and a coupling capacitor, the adjacent end surfaces of the dielectric resonator body are also integrally provided with an input port and an output port, and the input port and the output port are electrically connected with the metal transmission line.
[0008] Further, the metal transmission line and the coupling capacitor are integrally provided on the dielectric resonator body in the form of a silk-screen printed metal pattern.
[0009] Furthermore, the input port and the output port are laser-engraved onto the dielectric resonator body.
[0010] Furthermore, the input port and the output port are spaced apart at two corners of the end face of the dielectric resonator body.
[0011] The beneficial effects of this invention are as follows: This invention integrates the input port, output port, coupling capacitor, and metal transmission line onto the surface of the dielectric resonator. Since the coupling capacitor and transmission line are no longer introduced separately, the size of the dielectric notch filter can be greatly reduced. Due to the integrated design, no additional assembly tooling is required, and the screen printing process has a much higher precision than manual welding, eliminating the need for manual welding in dielectric notch filters manufactured using this process. The increased precision also reduces the workload of debugging. Compared to traditional dielectric notch filters, which are generally composed of resonators connected by transmission lines, with capacitive coupling between the resonators and the transmission lines, which hinders miniaturization, this invention's single-cavity surface-integrated dielectric notch filter facilitates mass production and automated manufacturing, effectively achieving low-cost, high-efficiency automated production. Attached Figure Description
[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0013] Figure 1 This is a structural diagram of a typical implementation of an existing dielectric notch filter;
[0014] Figure 2 This is a three-dimensional structural schematic diagram of the present invention;
[0015] Figure 3 These are the three views of this utility model;
[0016] Figure 4 Simulation diagram of a 3670MHz single-cavity surface-integrated dielectric notch filter;
[0017] Figure 5 The measured curves are for a single-cavity surface-integrated dielectric notch filter at 3670MHz.
[0018] 1. Dielectric resonator body; 2. Metal transmission line; 3. Coupling capacitor; 4. Input port; 5. Output port. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] This invention integrates the input port 4, output port 5, coupling capacitor 3, and metal transmission line 2 onto the surface of the dielectric resonator. Since the coupling capacitor and transmission line are no longer introduced separately, the size of the dielectric notch filter can be significantly reduced. Because the integrated design eliminates the need for additional assembly tooling, and the screen printing process has a much higher precision than manual soldering, the dielectric notch filter manufactured using this process eliminates the need for manual soldering. The increased precision also reduces the workload of debugging. Compared to traditional dielectric notch filters, which are generally composed of resonators connected by transmission lines and coupled to the transmission lines by capacitors (which hinders miniaturization), this invention's single-cavity surface-integrated dielectric notch filter facilitates mass production and automated manufacturing, effectively achieving low-cost, high-efficiency automated production.
[0021] In the first embodiment of this utility model, as Figure 2 , 3 As shown, a single-cavity surface-integrated dielectric notch filter includes a dielectric resonator body 1. The cross-section of the end face of the dielectric resonator body 1 forms a planar space. A metal transmission line 2 and a coupling capacitor 3 are integrated on the planar space. An input port 4 and an output port 5 are also integrated on the adjacent end face of the dielectric resonator body 1. The input port 4 and the output port 5 are both electrically connected to the metal transmission line 2.
[0022] Furthermore, both the metal transmission line 2 and the coupling capacitor 3 are integrated onto the dielectric resonator body 1 by screen printing metal patterns.
[0023] Furthermore, the input port 4 and the output port 5 are laser-engraved onto the dielectric resonator body 1.
[0024] Furthermore, the input port 4 and the output port 5 are spaced apart at two corners of the end face of the dielectric resonator body 1.
[0025] In the second embodiment of this utility model, taking a single-cavity surface-integrated dielectric notch filter with a notch frequency of 3670MHz as an example: a ceramic dielectric resonator with a dielectric constant ε=38 is used. Metallic silver paste is printed on the end face of the resonator to form a pattern of a metal transmission line 2 and a coupling capacitor 3. An input port 4 and an output port 5 are engraved at one end of the resonator, with a dimensional accuracy of ±0.1mm. The measured notch frequency is 3670MHz, the bandwidth is ±50MHz, and the insertion loss is ≤0.5dB, meeting the design requirements. Figure 4 and Figure 5 As shown in the figure, the notch frequency of the notch filter is 3670MHz, and the measured results and simulation results are in high agreement.
[0026] This invention integrates the input port 4, output port 5, coupling capacitor 3, and metal transmission line 2 onto the surface of the dielectric resonator. Since the coupling capacitor and transmission line are no longer introduced separately, the size of the dielectric notch filter can be greatly reduced. Due to the integrated design, no additional assembly tooling is required, and the screen printing process has a much higher precision than manual welding. The dielectric notch filter made using this process eliminates the manual welding process. The improved precision reduces the workload of debugging, facilitates mass automated production, and effectively achieves low-cost and high-efficiency automated production.
[0027] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A single-cavity surface-integrated dielectric notch filter, characterized in that, include: The dielectric resonator body (1) has a planar space formed on the cross-section of its end face. A metal transmission line (2) and a coupling capacitor (3) are integrated on the planar space. An input port (4) and an output port (5) are also integrated on the adjacent end face of the dielectric resonator body (1). The input port (4) and the output port (5) are both electrically connected to the metal transmission line (2).
2. The single-cavity surface-integrated dielectric notch filter according to claim 1, characterized in that: The metal transmission line (2) and the coupling capacitor (3) are both integrated onto the dielectric resonator body (1) by screen printing metal patterns.
3. The single-cavity surface-integrated dielectric notch filter according to claim 1, characterized in that: The input port (4) and the output port (5) are laser-engraved on the dielectric resonator body (1).
4. A single-cavity surface-integrated dielectric notch filter according to claim 1, characterized in that: The input port (4) and the output port (5) are spaced apart at two corners of the end face of the dielectric resonator body (1).