Designing a more efficient broadband 100 W Doherty power amplifier for cellular base-stations: Page 5 of 5

October 10, 2016 //By X Moronval, J Gajadharsing, Ampleon
The proliferating frequency bands and modulation schemes used in modern cellular networks are making it increasingly important that the RF power amplifiers used in base-stations offer the right combination of output power, multiband support and efficiency – at both peak and average power outputs.

These results are close to the performance of single-band DPAs, and is paving the way for the next generation of flexible and efficient cellular base-stations.


Figure 6: Measured performance with a 20 MHz-wide LTE signal (Source: Ampleon).

References

[1] W.H. Doherty, “A New High Efficiency Power Amplifier for Modulated Waves”, Proc. IRE, Sept. 1936.
[2] J. Qureshi, et al., “A wideband 20 W LDMOS Doherty power amplifier”, IEEE MTT-S IMS Dig., pp. 1504–1507, June 2010.
[3] L. Piazzon, et al., “A Wideband Doherty Architecture With 36% of Fractional Bandwidth”, IEEE Microw. Wireless Comp. Letters, Vol. 23, No. 11, Nov. 2013.
[4] X. Moronval, et al., “A 100 W Tri-Band LDMOS Integrated Doherty Amplifier for LTE-Advanced Applications”, IEEE MTT-S International Microwave Symposium, May 2015.
[5] J. Qureshi, et al., “A 700-W Peak Ultra-Wideband Broadcast Doherty Amplifier”, IEEE MTT-S IMS, June 2014.