Daniel John Shepphard

Articles

• Powell, J. R., Shepphard, D. J., Quaglia, R. and Cripps, S. C. 2018. A power reconfigurable high-efficiency $X$ -band power amplifier MMIC using the load modulated balanced amplifier technique. IEEE Microwave and Wireless Components Letters 28(6), pp. 527-529. (10.1109/LMWC.2018.2824560)
• Quaglia, R., Shepphard, D. J. and Cripps, S. 2017. A reappraisal of optimum output matching conditions in microwave power transistors. IEEE Transactions on Microwave Theory and Techniques 65(3), pp. 838-845. (10.1109/TMTT.2016.2627557)
• Shepphard, D., Powell, J. and Cripps, S. C. 2016. An efficient broadband reconfigurable power amplifier using active load modulation. IEEE Microwave and Wireless Components Letters 26(6), pp. 443-445. (10.1109/LMWC.2016.2559503)
• Powell, J. R., Shepphard, D. and Cripps, S. C. 2016. High efficiency GaN 2.5 to 9 GHz power amplifiers realized in multilayer LCP hybrid technology. IEEE Microwave and Wireless Components Letters 26(6), pp. 440-442. (10.1109/LMWC.2016.2559502)

Thesis

• Shepphard, D. 2018. Electronically reconfigurable wideband high-power amplifier architecture for modern RF systems (LMBA). PhD Thesis, Cardiff University.

Conferences

• Shepphard, D. J., Powell, J. and Cripps, S. C. 2017. A broadband reconfigurable load modulated balanced amplifier (LMBA). Presented at: IEEE MTT-S International Microwave Symposium (IMS), Honololu, HI, USA, 4-9 June 20172017 IEEE MTT-S International Microwave Symposium (IMS). IEEE pp. 943-945., (10.1109/MWSYM.2017.8058743)