The UHF (470 - 800 MHz) market is diversifying and taking different approaches to the implementation of full band coverage with highest possible efficiency. The two main paths are single band ultra-wideband Doherty (UWB) solutions or classical or wideband Doherty solutions using sub-bands.

Ampleon supports both approaches with dedicated RF power transistors and application designs. For example, our latest BLF888E transistor is a 3-band ultra-wideband Doherty solution achieving 50 % efficiency across the band. This is a unique solution in the market.

For classical Doherty we are also developing solutions based on our upcoming BLF898 transistor which will have the highest DVB-T power capability (180 W average) and will be capable of covering the complete UHF band using a flexible output combiner design with multiple sub-bands. We are also working on an odd-mode Doherty solution based on the upcoming BLF898(S).

Whitepaper Doherty Architectures in UHF

This White Paper explains different PA architectures which can be used in today’s UHF Broadcast industry. 

In this paper a brief discussion will be given to explain these new Doherty architectures and to help customers finding the best solution for their transmitter. Ampleon’s transistor family BLF8XX can support these Doherty architectures.

Please register to download the latest information.

Recommended Products

Type Package Fmin (MHz) Fmax (MHz) PL(1dB) (W) PL(AV) (W) VDS (V) ηD (%) Gp (dB) Test signal
BLP35M805 SOT1371-1 10 3500 5 - 28 17 18 CW pulsed, class-AB
BLP27M810 SOT1371-1 10 2700 10 - 28 19 17 Pulsed CW
BLF640 SOT538A 10 2200 10 - 28 31 19.3 1-c W-CDMA
BLF571 SOT467C 10 500 20 - 50 70 27.5 CW
BLP10H630P SOT1223-2 10 1000 30 - 50 68 18 Pulsed RF
BLF642 SOT467C 1 1400 35 - 32 63 19 CW
BLP10H660P SOT1223-2 10 1000 60 - 50 68 18 Pulsed RF
BLP10H690P SOT1223-2 10 1000 90 - 50 68 18 Pulsed RF
BLP10H6120P SOT1223-2 10 1000 120 - 50 68 18 Pulsed RF
BLF881(S) SOT467C(B) 1 1000 140 - 50 49 21 CW
BLP15M7160P SOT1223-2 10 1500 160 - 28 59.7 19.4 CW
BLF882(S) SOT502A(B) 10 860 200 - 50 63 20.6 CW
BLF884P(S) SOT1121A(B) 470 860 300 - 50 46 21 CW
BLF888A(S) SOT539A(B) 470 860 600 110 50 31 20 DVB-T (8k OFDM)
BLF888B(S) SOT539A(B) 470 860 650 120 50 33 21 DVB-T (8k OFDM)
BLF888D(S) SOT539A(B) 470 806 - 115 50 40 17 DVB-T (8k OFDM)
BLF888E(S) SOT539A(B) 470 790 - 150 50 52 17 DVB-T (8k OFDM)
BLF898(S) SOT539A(B) 470 806 900 180 50 32 16 DVB-T (8k OFDM)

See the complete product portfolio