5-2400MHz broadband distributor provided with micro-strip type distributed capacitor
By using microstrip distributed capacitors instead of lumped capacitors in broadband distributors, the cost-effective and unstable problems in the prior art are solved, and a more stable and lower-cost signal distribution is achieved.
Patent Information
- Application Number
- CN202421930042.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-10
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-08-10
AI Technical Summary
In existing broadband splitter circuit designs, the use of lumped capacitance components leads to high cost and instability.
Microstrip distributed capacitors are used instead of the lumped capacitors and are directly printed on the PCB board to achieve wide-band distribution of signals.
Improves the stability of broadband distributors and reduces costs.
Smart Images
Figure CN223141998U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a television signal data transmission technology. Background Art
[0002] The existing broadband splitter circuit design commonly uses two magnetic core coils, which are composed of a lumped capacitance element for broadband matching provided at the center tap of the coil, and there are problems of high cost and instability of the lumped element. Content of the Utility Model
[0003] In order to solve the deficiencies of the existing technology, the utility model provides a broadband splitter that uses a microstrip distributed capacitance to replace the original lumped capacitance element and directly prints the capacitance in a distributed manner on the PCB board.
[0004] A 5 - 2400 MHz broadband splitter with a microstrip distributed capacitance in the utility model includes a double-sided PCB board, a first magnetic core coil B1, a second magnetic core coil B2, a first DC-blocking capacitor C1, a second DC-blocking capacitor C2, a third DC-blocking capacitor C3, and a distributed microstrip capacitor 3. The double-sided PCB board includes a PCB board bottom layer, an insulating layer, and a PCB board top layer arranged from bottom to top in sequence. The PCB board bottom layer is provided with a transmission line ground, and the PCB top layer is provided with a signal input IN, a first signal output OUT1, a second signal output OUT2, a transmission line, and a microstrip distributed capacitance; the signal input IN, the first magnetic core coil B1, and the microstrip distributed capacitance are connected in sequence, and the first signal output OUT1 and the second signal output OUT2 are respectively connected to the second magnetic core coil B2. The signal input IN is input to the first magnetic core coil B1, passes through the center tap of the first magnetic core coil B1 to the microstrip distributed capacitance; then it is distributed to OUT1 and OUT2 for output through the second magnetic core coil B2, realizing broadband signal distribution.
[0005] Preferably, the signal input IN is arranged in the middle of the upper part of the PCB, the first signal output OUT1 is arranged on the left side of the lower part of the PCB, and the second signal output OUT2 is arranged on the right side of the lower part of the PCB. The output signal has a good effect and is convenient to use.
[0006] Preferably, the thickness of the PCB board is 0.6 - 1.6 mm. Preferably, the thickness of the PCB board is 0.8 mm. Preferably, the insulating layer is FR4. It has low cost and is convenient for processing.
[0007] The beneficial effect of the utility model: Since the microstrip distributed capacitance replaces the original lumped capacitance element, the stability of the broadband splitter is improved and the cost is reduced. Description of the Drawings
[0008] Figure 1 It is a schematic circuit diagram of the utility model.
[0009] Markings in the figure: 1. Transmission line ground 1; 2. Transmission lines are provided on the top layer of the PCB; 3. Microstrip distributed capacitor. Specific implementation mode
[0010] The present utility model will be further described in detail below with reference to the accompanying drawings, but it should not be understood that the scope of the above-mentioned subject matter of the present utility model is limited to the above embodiments.
[0011] As Figure 1 shown, the denser cross-hatching in the figure represents the top layer of the PCB board, and the sparser cross-hatching represents the bottom layer of the PCB board; a 5 - 2400 MHz broadband distributor provided with a microstrip distributed capacitor includes a double-sided PCB board with a thickness of 0.8 mm, a first magnetic core coil B1, a second magnetic core coil B2, a first DC-blocking capacitor C1, a second DC-blocking capacitor C2, and a third DC-blocking capacitor C3. The first magnetic core coil B1 and the second magnetic core coil B2 include lumped elements. The double-sided PCB board includes a PCB board bottom layer, an insulating layer, and a PCB board top layer arranged in sequence from bottom to top. The PCB board bottom layer is provided with a transmission line ground 1, and the PCB top layer is provided with a signal input IN, a first signal output OUT1, a second signal output OUT2, a transmission line 2, and a microstrip distributed capacitor 3. The signal input IN is arranged in the middle of the upper part of the PCB, the first signal output OUT1 is arranged on the left side of the lower part of the PCB, and the second signal output OUT2 is arranged on the right side of the lower part of the PCB. The signal input IN is input to the first magnetic core coil B1, passes through the center tap of the first magnetic core coil B1 to the microstrip distributed capacitor 3, and then is distributed to OUT1 and OUT2 for output through the second magnetic core coil B2, realizing broadband signal distribution.
[0012] The technology of replacing the original lumped element capacitor with this microstrip distributed capacitor is described as a patent with 2-way distribution. Similarly, it can be extended to the distributor circuits applicable to 3-way, 4-way, 5-way, 6-way, and 8-way distributions.
Claims
1. A 5 - 2400 MHz broadband splitter with microstrip distributed capacitance, comprising a double-sided PCB board, characterized in that, It also includes a first magnetic core coil B1, a second magnetic core coil B2, a first DC-blocking capacitor C1, a second DC-blocking capacitor C2, and a third DC-blocking capacitor C3. The first magnetic core coil B1 and the second magnetic core coil B2 include lumped elements. The double-sided PCB board includes a PCB board bottom layer, an insulating layer, and a PCB board top layer that are arranged from bottom to top. The PCB board bottom layer is provided with a transmission line ground, and the PCB top layer is provided with a signal input IN, a first signal output OUT1, a second signal output OUT2, a transmission line, and a microstrip distributed capacitor. The signal input IN, the first magnetic core coil B1, and the microstrip distributed capacitor are connected in sequence, and the first signal output OUT1 and the second signal output OUT2 are respectively connected to the second magnetic core coil B2.
2. A 5-2400 MHz broadband splitter with a microstrip distributed capacitance as claimed in claim 1, wherein, The signal input IN is arranged in the middle of the upper part of the PCB, the first signal output OUT1 is arranged on the left side of the lower part of the PCB, and the second signal output OUT2 is arranged on the right side of the lower part of the PCB.
3. A 5 - 2400 MHz broadband splitter with a microstrip distributed capacitance as claimed in claim 1, characterized in that, The thickness of the PCB board is 0.6 - 1.6 mm.
4. A 5 - 2400 MHz broadband splitter with a microstrip distributed capacitance according to claim 3, characterized in that, The thickness of the PCB board is 0.8 mm.
5. A 5 - 2400 MHz broadband splitter with a microstrip distributed capacitance as claimed in claim 1, characterized in that, The insulating layer is FR4.