KU PA 340360-4 A, Leistungsverstärker
KU PA 340360-4 A, Leistungsverstärker KU PA 340360-4 A, Blockdiagramm

KU PA 340360-4 A, RF Power Amplifier

'.3 Jahre Garantie / 3 years guarantee.'
'.Isolator / Ausfallsicherheit / reliability.'
'.Kühlung auf Anfrage / cooling on request.'
3400 ... 3600 MHz • 4 W

This power amplifier provides high linearity. An isolator at the output protects the semiconductor devices from reverse power. Very good harmonic rejection is achieved. Two detector outputs allow permanent monitoring of forward and reverse power. Typical applications of this amplifier are digital broadcast and communication systems like Digital Video Broadcast (DVB) or Digital Multimedia Broadcast (DMB). The amplifier contains an automatic level control (ALC). The desired output power can be adjusted continuously, from nearly zero to the maximum output power.
Lead time on request
Frequency range3400..3600 MHz
Input power for P1dBtyp. -12 dBm
Maximum input power+10 dBm
Output power P1dBmin. 36 dBm (CW)
min. 4 W (CW)
Output power COFDM (1)typ. 31.7 dBm, min. 30 dBm
typ. 1.5 W, min. 1 W
Automatic level control (ALC)yes (adjustable ALC)
Gain (small signal)typ. 46 dB
Gain flatness (small signal)typ. +/- 2.5 dB
Harmonic rejection typ. 60 dB, min. 52 dB @ 36 dBm
VSWR protectionIsolator
IM3 (2)typ. 45 dBc, min. 41 dBc @ 30 dBm PEP
Efficiency typ. 14 % @ 36 dBm
Input return loss (S11)typ. 12 dB
ON voltage+5 ... 14 V DC
Supply voltage+11 ... 14 V DC
Current consumptiontyp. 2.5 A
Forward detectionyes (diode detector)
Operating case temp. range-20 ... +55 °C
Input connector / impedanceSMA-female / 50 ohms
Output connector / impedanceSMA-female / 50 ohms
Casemilled aluminium
Dimensions (mm)158 x 60 x 20
Weight310 g (typ.)
(1)Measured with QAM 64, single carrier, EVM: 2%
(2)Measured 2-tone, frequency spacing: 1 MHz
  • GaAs FET technology
  • High linearity (class A operation)
  • Good harmonic rejection
  • Isolator for protection against high VSWR
  • Reverse polarity protection
  • Monitor outputs for foward and reverse power detection (DC voltage)
  • Adjustable ALC (automatic level control)
  • ON / OFF control with DC voltage (ON at 5 ... 14 V DC)
  • Digital broadcast systems (DVB, DMB)
  • COFDM systems using modulation types QPSK, QAM
  • Analog transmission systems
  • With reduced power suitable for DATV (digital amateur television)
Please notice the following:
  • The technical specifications refer to room temperature.
  • The power amplifier doesn’t contain any coaxial relays.
  • The recommended combination of heat sink and fan(s) is only specified for an ambient temperature of 25 °C.
  • Further information about dimensioning of heat sinks is available on our FAQ site.

Accessories

References

Radio frequency (RF) and microwave power amplifiers (PAs) are electronic circuits used for the amplification of low power radio frequency signals to high power levels. The most common application of such high-power RF signals is driving of transmit antennas in wireless communications. Since the RF signals are attenuated as they propagate through space, wireless coverage of large areas or wide-range point-to-point connections often require large amounts of transmit power. Another application of high-power RF signals is the generation of strong electromagnetic fields in various types of cavities, where they are used for technical and physical processes like microwave heating, plasma generation, particle acceleration, or in test and measurement setups for EMC tests and characterization of RF and microwave components. Technical applications requiring high RF power levels range from microwave cooking to the treatment and finishing of materials and surfaces as well as medical appliances and optics. The characteristic performance criteria of RF power amplifiers include frequency, RF bandwidth, video bandwidth, maximum output power, energy efficiency and linearity. With his choice of an appropriate power amplifier circuit topology and active device technology (LDMOS, GaN / GaAs HEMT, InGaP HBT, etc…), the RFPA designer tries to find the best possible balance between these, often conflicting, performance criteria, based on the requirements of a given application. For example, a Class A amplifier can be highly linear, generates little harmonics and is rather robust, but is very inefficient on the other hand. It is chosen for applications that demand very high linearity and/or very high bandwidth. In contrast, the Class AB amplifier can be made far more efficient but will not be as linear as the Class A amplifier. It is best suited for applications that demand moderate linearity and bandwidth but benefit from its high efficiency. For applications that require both high linearity and high efficiency, the Class AB amplifier can be linearized using analogue, digital or hybrid predistortion techniques. In very demanding applications like cellular mobile radio or digital terrestrial television broadcast, more sophisticated circuit topologies like the Doherty PA are commonly used to further increase the average efficiency of the transmitter chain while maintaining high linearity. Due to the scarcity of wireless spectrum and the subsequent need for efficient spectrum usage, the wireless communications field is dominated by modulation formats that impose strict linearity requirements on the power amplifier. In contrast to that, the high-power RF signal generators used in technical applications usually generate constant envelope signals at fixed frequencies and thus do not rely on high linearity power amplifiers. Under such conditions, switched mode power amplifiers can be used. By operating the active devices in saturation and application of waveform shaping techniques, these nonlinear power amplifiers enable very high energy efficiencies of up to 80% and more.