Çapraz konfigürasyonda schottky karıştırıcı diodların performans sınırlamalarının bilgisayar destekli analizi ve optimizasyonu
Başlık çevirisi mevcut değil.
- Tez No: 29715
- Danışmanlar: PROF. DR. FİLİZ GÜREŞ
- Tez Türü: Doktora
- Konular: Elektrik ve Elektronik Mühendisliği, Electrical and Electronics Engineering
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 1993
- Dil: Türkçe
- Üniversite: Yıldız Teknik Üniversitesi
- Enstitü: Fen Bilimleri Enstitüsü
- Ana Bilim Dalı: Elektronik ve Haberleşme Mühendisliği Ana Bilim Dalı
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 258
Özet
SUMMARY Mixer circuits have been among the most important nonlinear microwave circuits; Schottky diodes with their performances up to milimetric frequency ranges have been among the most popular mixing devices and the balanced circuits have been among the most used types of circuits in the microwave electronics. A mixer performance can be decomposed into two components: £=£,£,, F=F F c op ' op where the intrinsic loss L0 and noise F0 are due to loss and noise of the nonlinear junction resistance, respectively. The intrinsic performance components (L^Fo) include mismatchings at the radio frequency (RF) and the intermediate frequency 0F) ports too. The parasitic loss L,, and noise Fp are caused by the additional loss and noise of the linear and nonlinear diode parasitic elements, respectively. Influences, of the dissipated RF power and thermal noise in the diode series resistance rs are simulated by including it into the equivalent circuits of the diode. Naturally, performance limitations of the Schottky mixing diodes in the lattice configuration are determined by the intrinsic performance components (LJF,,). In this work, the intrinsic performance components have been analyzed, based on the nonlinear microwave circuit theory, for the eight different mixer circuits which are Z-, Y-, H-, G- types of the lattice mixer either the open- or short- circuited image termination, and then combined under an unified framework for computer-aided analysis and optimization. Ctonversion.îolssanŞv noise figure are optimized independently with respect to (i) (RF) and (IF) port^;.'* \terminations, (ii) local oscillator power which controls the general mixer circuit parameters M, (iii) the circuit type. According to these two different optimization criteria, variations of performances (RF), (IF) terminations with respect to the local oscillator power have been obtained for the eight different mixer circuits. Besides, noise of the microwave receiver front-end which consists of the mixer+IF amplifier combination, have been obtained in terms of the noise figure or noise temperature. The second type of the computer simulation output can be grouped under the name“Performance Comparison Curve”family. This group consists of curves comparing the performances with either the two different optimization criteria or the same criter but different types of circuits. As the results, the lattice mixer circuits have been ordered with respect to their merit figures and the discussion have been made about the realizations of the necessary port terminations.
Özet (Çeviri)
SUMMARY Mixer circuits have been among the most important nonlinear microwave circuits; Schottky diodes with their performances up to milimetric frequency ranges have been among the most popular mixing devices and the balanced circuits have been among the most used types of circuits in the microwave electronics. A mixer performance can be decomposed into two components: £=£,£,, F=F F c op ' op where the intrinsic loss L0 and noise F0 are due to loss and noise of the nonlinear junction resistance, respectively. The intrinsic performance components (L^Fo) include mismatchings at the radio frequency (RF) and the intermediate frequency 0F) ports too. The parasitic loss L,, and noise Fp are caused by the additional loss and noise of the linear and nonlinear diode parasitic elements, respectively. Influences, of the dissipated RF power and thermal noise in the diode series resistance rs are simulated by including it into the equivalent circuits of the diode. Naturally, performance limitations of the Schottky mixing diodes in the lattice configuration are determined by the intrinsic performance components (LJF,,). In this work, the intrinsic performance components have been analyzed, based on the nonlinear microwave circuit theory, for the eight different mixer circuits which are Z-, Y-, H-, G- types of the lattice mixer either the open- or short- circuited image termination, and then combined under an unified framework for computer-aided analysis and optimization. Ctonversion.îolssanŞv noise figure are optimized independently with respect to (i) (RF) and (IF) port^;.'* \terminations, (ii) local oscillator power which controls the general mixer circuit parameters M, (iii) the circuit type. According to these two different optimization criteria, variations of performances (RF), (IF) terminations with respect to the local oscillator power have been obtained for the eight different mixer circuits. Besides, noise of the microwave receiver front-end which consists of the mixer+IF amplifier combination, have been obtained in terms of the noise figure or noise temperature. The second type of the computer simulation output can be grouped under the name“Performance Comparison Curve”family. This group consists of curves comparing the performances with either the two different optimization criteria or the same criter but different types of circuits. As the results, the lattice mixer circuits have been ordered with respect to their merit figures and the discussion have been made about the realizations of the necessary port terminations.
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