50 MHz – 26,5 GHz Aralığında Çalışan Toplam Güç Radyometrenin Gerçekleştirilmesi ve Test Edilmesi - Realization and Test of The Total Power Radiometer Working Between 50MHz and 26.5 GHz Frequency Range

Yıl 2013, Cilt: 3 Sayı: 5, 7 - 15, 14.02.2013

Murat Celep Şenel Yaran Cem Hayırlı Arif Dolma

Öz

Bu çalışmada, yarı iletken bir gürültü kaynağının “excess noise source” (ENR) değerini izlenebilir şekilde ölçmek için bir toplam güç radyometre kurulmuştur. Oldukça geniş olarak kabul edilen 50 MHz – 26,5 GHz frekans aralığında, gürültü kaynağını tek seferde ölçebilen bu sistemin testi, nominal 15 dB ENR değerine sahip standart gürültü kaynakları kullanılarak yapılmıştır. Geliştirilen toplam güç radyometre kullanılarak, değeri bilinen bir gürültü kaynağının hesaplanan ENR değerleri ile gerçek ENR değerleri arasındaki farklar ≤ç0,30ç dB olarak elde edilmiştir. Ölçülen ENR değerlerinin belirsizlikleri ise 0,13 dB ile 0,34 dB aralığında hesaplanmış olup, geçek değer ve ölçülen değer arasındaki farklar belirsizlik değerleri içerisinde bulunmuştur.

In this study, a total power radiometer was established to measure the value of "excess noise source" (ENR) of a semiconductor noise source in a traceable manner. The test of this system which can measure the noise source at a time is performed between the frequency range of 50 MHz to 26.5 GHz, accepted as highly wide, by using standard noise sources with a nominal value of 15 dB ENR. The difference between the actual ENR value and the calculated ENR value of the known noise source was obtained as ≤ç0.30ç by using the developed total power radiometer. Uncertainty of the measured ENR values are calculated in the range of 0.13 dB and 0.34 dB, and the difference between the actual value and the measured value was found in the uncertainty values.

Anahtar Kelimeler

Belirsizlik, excess noise ratio, gürültü, gürültü kaynağı, toplam güç radyometre - Excess noise ratio, noise, noise source, total power radiometer, uncertainty

Kaynakça

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