Phase noise improvement in a loop configuration of oscillating antennas
Résumé
Phase noise in a four-element array of oscillating antennas is analyzed for a loop configuration and a unilateral coupling topology. It is demonstrated that this structure, basically designed for circular polarization (CP) applications, also yields a 75% reduction of the near-carrier phase noise compared to a single oscillator. Experimental validation is made at 4 GHz. For this structure, deviation of the coupling phase from its nominal value has no influence on the phase noise performance.
Mots clés
- Steady-state
- electromagnetic wave polarisation
- active antenna arrays
- phase noise improvement
- loop configuration
- oscillating antennas
- four-element array
- unilateral coupling topology
- circular polarization applications
- near-carrier phase noise
- phase noise performance
- Microstrip antenna arrays
- Frequency
- Microwave oscillators
- Linear antenna arrays
- Polarization
- Coupling circuits
- Phased arrays
- Injection-locked oscillators
- Phase noise
- 4 GHz