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ENJEKTE KİLİTLEME METODU İLE MİKRODALGA OSİLATÖRLERİN FAZ KONTROLÜ

Phase Control of Microwave Oscillators by the Method of Injection Locking

Journal Name:

  • Uludağ Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

Publication Year:

  • 2012

Key Words:

Keywords (Original Language):

Author NameUniversity of Author
Abstract (2. Language): 
The phase control in microwave circuits is an important process for many applications. Especially, in the phase array antennas, this is the main principle of operation. In the array antennas, each array element is fed by an individual oscillator. The radiation pattern and the radiated power of the antenna can be adjusted by controlling the phase of the oscillators. In such applications, the phase shifters have been used frequently. However, their high costs, difficulties in efficiency and design are important disadvantages. Another new technique for microwave phase control is called the “Injection locking”. In this method, a single reference signal (injection signal) is connected (injected) in parallel to each microwave oscillator. When the certain conditions are met, the phase of the each oscillator can be controlled by the signal amplitudes, oscillator’s free running frequencies and their quality factors (Q). Thus, the new method offers more cost effective and precise phase control than the phase shifters in microwave applications. In this paper, this new phase control technique is examined in the theory and in the original application of a 1-GHz oscillator system.
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Abstract (Original Language): 
Mikrodalga devrelerde faz kontrolü birçok uygulama için önemli bir işlemdir. Özellikle faz kontrollü anten dizilerinin temel çalışma prensibidir. Anten dizilerinde her bir dizi elemanı tek bir mikrodalga osilatör ile beslenir. Bu osilatörlerin fazları kontrol edilerek tüm antenin ışıma şekli ve yayılan güç istenildiği gibi ayarlanabilir. Bu ve benzeri uygulamalarda, faz kaydırıcılar sıkça kullanılmaktadır. Bununla birlikte, faz kaydırıcıların yüksek maliyeti, verimlilik ve tasarım güçlükleri önemli kayıplarıdır. Bir başka yeni uygulama ise, “Enjekte kilitlemesi” adında bir tekniktir. Burada tek bir referans sinyalinin (enjekte sinyal) her bir mikrodalga osilatörün giriş empedansına paralel bağlanması (enjekte edilmesi) öngörülmektedir. Belirli şartlar altında osilatörlerin faz kontrolü sinyallerin genliğine, osilatörlerin serbest çalışma frekanslarına ve kalite faktörlerine (Q) bağlı olarak değiştirilebilir. Böylece mikrodalga faz kaydırıcılara göre çok daha az maliyetli ve hassas faz kontrolü sağlanabilir. Bu makalede, bu yeni faz kontrol tekniğinin teorisi ve 1-GHz bir osilatör sistemi için özgün bir uygulaması incelenmiştir.
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  • 1
43-49
  • Turkish

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