Radio Frequency Pulse Power Amplifier General Features

Transcription

1 Product Information Radio Frequency Pulse Power Amplifier General Features When we designed our pulse power amplifier series we had in mind the requirements of spectroscopic analysis, for instance Nuclear Magnetic Resonance (NMR/MRI) Electron Paramagnetic Resonance (ESR/EPR) Electron Nuclear Double Resonance (EN- DOR) and similar applications. We have striven to achieve excellent linearity, plus phase and amplitude stability. Additional emphasis we put on the RF fall time as this is a critical parameter for many applications. We apply state of the art LDMOS transistor amplifier stages. This way the amplifiers are robust to cope with mismatch conditions. The amplifiers are controlled by a micro controller. barthel HF Technik GmbH T.+49/(0)241/ Geschäftsführer: Dipl.-Ing. M. Barthel Walkmühlenstraße 16 F.+49/(0)241/ USt-ID-Nr. DE D Aachen mail@barthel-hf.com HRB Amstgericht Aachen

2 We barthel HF Technik from Aachen supply our customers for more than 11 years with powerful radio frequency. Our amplifiers, generators, matching networks are to be used in Spectroscopy (NMR/MRI), in Plasma Technology, in Particle Accelerators, and in Dielectric Heating. Time and again customers from research and industry entrust us with their challenges and ideas so that we can contribute to solutions and realizations. We strive to come up with best solutions. Our customers and we ourselves are satisfied when the solution is as complex as necessary and at the same time as simple as possible. That is what we are passionate about.

3 barthel HF Technik: RFPA General Features 3 Standard Data The following numbers reflect typical values of a general amplifier. Please refer to the data sheet of the respective amplifier for exact data. Some of the data are altered by available options which are described in the next section. Input Power for Nominal Output Power Max. Pulse Length 0 dbm 10 ms Max. Duty Cycle 10 % Input VSWR 1.15 : 1 Load Impedance 50 Ω Linearity Compression 1st/2nd Harmonic Distortion ± 0.5 db (typ.) 0.3 db (typ.) -18 / -13 dbc (typ. broadband) -25 / -20 dbc (typ. narrowband) RF Rise Time RF Fall Time Pulse Droop at 5 ms Blanking Delay 300 ns (typ.) 150 ns (typ.) 0.1 db (typ.) 5 µs (typ.) RF Input RF Output Blanking Mains Voltage BNC type N type BNC type (TTL level) IEC C13/C14 Remote Control RS 232 / Sub D 9 The RF pulse power amplifier can be remotely controlled with a serial data connection. There are two protocols implemented a proprietary binary protocol, and an ASCII protocol. barthel HF Technik GmbH T.+49/(0)241/ Geschäftsführer: Dipl.-Ing. M. Barthel Walkmühlenstraße 16 F.+49/(0)241/ USt-ID-Nr. DE D Aachen mail@barthel-hf.com HRB Amstgericht Aachen

4 4 barthel HF Technik: RFPA General Features Energy Control In its standard version the pulse power amplifier controls the maximum pulse power, the maximum pulse length, and the maximum duty cycle. If either parameter exceeds its limit the amplifier protects itself and turns off the RF amplification. With the option Energy Control the parameters output power and duty cycle are connected to each other. The maximum RF pulse power is still controlled. In case it exceeds its maximum limit it will cause an error. The pulse length is not any longer controlled separately. With a reduced output power even CW operation is possible. The duty cycle and the RF output power are combined to an energy control. The smaller the output power the higher the duty cycle may be. Short Pulse Detect In its standard version the pulse power amplifier can detect, measure, and display the RF power of pulses that have a length of at least 50 µsec. With the option Short Pulse Detect the minimum detectable pulse length is reduced to 2 µsec. Fast Pregate A typical value for the blanking delay is 5 µsec for an amplifier in its standard version. Although this value depends greatly on the amplifier s bandwidth. Now, with the option Fast Pregate the blanking delay is reduced to approximately 1 µsec only. Long Pulse With the option Long Pulse the maximum pulse length is increased from 10 µsec to 100 µsec.

5 barthel HF Technik: RFPA General Features 5 Platform Pix The Platform Pix houses amplifiers with an output power of up to 100 Watts for broadband and up to 250 Watts for narrowband amplifiers. Platform Piii The Platform Piii houses amplifiers with an output power of up to 1 kw for broadband and up to 2 kw for narrowband amplifiers. Platform Pii The Platform Pii houses amplifiers with an output power of up to 2 kw for broadband and up to 4 kw for narrowband amplifiers. barthel HF Technik GmbH Walkmühlenstraße 16 D Aachen T.+49/(0)241/ F.+49/(0)241/ mail@barthel-hf.com Geschäftsführer: Dipl.-Ing. M. Barthel USt-ID-Nr. DE HRB Amstgericht Aachen

6 6 barthel HF Technik: RFPA General Features Multi Channel The Multi Channel Platform consists of up to four power amplifier modules plus one master module. Each module houses in a Platform Piii cabinet. The master module contains RF splitters and combiners. It allows to either use the power amplifier module s as separate channels or to combine them to a single output. The master module acts as master to the power amplifier modules which act as slaves in the system. All modules communicate via a link line. Via the master module the amplifier can be controlled remotely. Water Cooling All above mentioned platforms are air cooled. Currently, we are working on a water cooled platform for higher RF powers in a compact cabinet. Customized Modules In addition to the stand alone amplifiers we also design customized amplifier modules to fit perfectly into your system. Please contact us with your requirements.