Studies of power measurements in a microwave power system via a directional coupler

Authors

Leo Mendel D. Rosario ⋅ PH National Institute of Physics, University of the Philippines Diliman
Julie S. Ting ⋅ PH National Institute of Physics, University of the Philippines Diliman
Elias Teofilo Osorio ⋅ PH National Institute of Physics, University of the Philippines Diliman
April M. Ulano ⋅ PH National Institute of Physics, University of the Philippines Diliman
Marko E. Arciaga ⋅ PH National Institute of Physics, University of the Philippines Diliman
Roy B. Tumlos ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

In this study, 125 tuner stub settings of the microwave power system (MPS) were used to find maximum and minimum powers delivered to a 1 liter water target load by using a directional coupler for power measurement. It was found that these stub settings were UUU (586 W) and 3/4D1/4 (24 W), respectively. Also calorimetry and voltage signal scaling were compared to the directional coupler power measurements to validate previous results. It was found that calorimetry has a maximum difference of 3% with respect to the directional coupler power measurements in the dummy load while 11% for voltage signal scaling with a scaling factor of 8.2 kW/V. We can say that the water temperature rise for a maximum input power of 780 W is still small enough to cause a significant heat loss in calorimetric power measurements.

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Issue

2007: Proceedings of the 25th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2007-PB-33

Section

Poster Session PB

Published

2007-10-24

How to Cite

[1]

LMD Rosario, JS Ting, ET Osorio, AM Ulano, ME Arciaga, and RB Tumlos, Studies of power measurements in a microwave power system via a directional coupler, Proceedings of the Samahang Pisika ng Pilipinas 25, SPP-2007-PB-33 (2007). URL: https://proceedings.spp-online.org/article/view/SPP-2007-PB-33.