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The Power of RF Systems: The Critical Role of High-Voltage Doorknob Capacitors in NMR Probes and Power Amplifiers

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The Power of RF Systems: The Critical Role of High-Voltage Doorknob Capacitors in NMR Probes and Power Amplifiers

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Brand Name : XIWUER

Certification : ISO9001,ISO14001,ISO45001

Place of Origin : XIAN, CHINA

MOQ : 1pcs

Price : Negotiable

Payment Terms : L/C,T/T

Supply Ability : 4,000,000 pcs a year

Delivery Time : 5-7days

Packaging Details : Carton

Dissipation : ≦0.0040

Withstanding voltage : 1.5Ur● 1min

Insulation resistance : ≧1.0×105MΩ

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The Power of RF Systems: The Critical Role of High-Voltage Doorknob Capacitors in NMR Probes and Power Amplifiers

The radio frequency system of a nuclear magnetic resonance instrument is a key component for exciting atomic nuclei and receiving their weak signals. Its performance directly determines the instrument's sensitivity and accuracy. Both the high-power radio frequency pulses required by the transmitting coil and the low-noise amplifier at the front end of the receiving channel require a stable, efficient high-voltage power supply. High-voltage doorknob capacitors play a key role in pulse shaping and energy transfer.

Drawing:
The Power of RF Systems: The Critical Role of High-Voltage Doorknob Capacitors in NMR Probes and Power Amplifiers

Parameters:

No. Specification Dissipation Withstanding voltage Insulation resistance Dimension(mm)
1 20kV-2000pF








≦0.0040








1.5Ur 1min








≧1.0×105MΩ

D H L D M
2 20kV-10000pF 45 19 23 12 5
3 20kV-18000pF 65 15 19 12 5
4 30kV-1000pF 80 17 25 12 5
5 30kV-2700pF 45 24 32 12 4
6 30kV-12000pF 60 20 28 12 4
7 40kV-150pF 20 33 41 8 4
8 40kV-500pF 28 33 41 8 4
9 40kV-7500pF 80 24 29 12 6
10 40kV-10000pF 80 22 26 16 5
11 50kV-1000pF 50 30 34 12 4
12 50kV-1000pF 32 27 31 16 5
13 50kV-5600pF 80 31 35 16 5
14 60kV-1500pF 50 31 34 12 5
15 60kV-3000pF 65 32 35 16 5
16 100kV-500pF 50 54 58 12 5
17 100kV-2000pF 51 32 35 16 5
18 Insulator type 100kV-1500pF 68 36 40 16 5
19 150kV-820pF 65 95 100 12 5
20 200kV-600pF 50 90 94 16 5


Solution: Ensuring Energy for High-Fidelity RF Pulses

High-voltage doorknob capacitors play a critical role in the anode modulation circuit or DC energy storage of RF power amplifiers:
Pulse Energy Sink: During RF pulse transmission, the amplifier requires a high instantaneous current. Our capacitors act as efficient instantaneous energy reservoirs, providing high peak currents to ensure a steep leading edge and a flat top of the RF pulse.

Efficient Filtering: Their low ESR/ESL characteristics ensure extremely low high-frequency impedance on the power bus, effectively suppressing interference from power stage switching noise on the RF signal and guaranteeing a pure output waveform.


Non-Magnetic Design:

Ensuring the Performance Bottom Line of Ultra-High-Field Spectrometers
In ultra-high-field NMR instruments, any slight paramagnetic or ferromagnetic impurities can severely disrupt the uniformity of the main magnetic field. Our high-voltage doorknob capacitors are optionally constructed of completely non-magnetic materials (such as specialized ceramic dielectrics, non-magnetic epoxy resins, and silver-plated terminals) to ensure they introduce no magnetic field interference, ensuring the instrument achieves its designed resolution.



Product Tags:

high voltage doorknob capacitors for NMR probes

      

high voltage capacitors for power amplifiers

      

doorknob capacitors with high voltage rating

      
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