Question
Which of the following is a technique for providing highly accurate and stable oscillators needed for microwave transmission and reception?
Answer Options
- A) Use a GPS signal reference
- B) Use a rubidium stabilized reference oscillator
- C) Use a temperature-controlled high Q dielectric resonator
- D) All these choices are correct
Correct Answer: D
Explanation
Microwave and high-frequency communication systems require extremely accurate and stable frequency sources (oscillators). Frequency errors are multiplied at these high frequencies, making even small amounts of drift unacceptable. Achieving this level of precision requires employing highly sophisticated stabilization techniques.
Techniques used include: locking the oscillator to an external, highly accurate signal, such as a GPS signal reference (GPSDO); using a primary frequency standard, like a rubidium stabilized reference oscillator; or stabilizing the internal components with temperature control, such as a temperature-controlled high Q dielectric resonator (TCXO or OCXO). Therefore, All these choices are correct as methods used to achieve the necessary stability for microwave systems.
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