System and method for an ultra low noise micro-wave coaxial resonator oscillator using ⅝ths wavelength resonator
View Patent ↗A system and method for a novel microwave coaxial resonator oscillator using a ⅝ths wavelength resonator is described. The novel system and method provides a coaxial resonator for operation at high frequencies comprising a conductive resonator and a coaxial conductive outer shell electrically connected by an conductive end member, wherein the conductive resonator and outer shell are of a length approximately equal to (1/8+n/2) of the wavelength of the desired frequency, where n is a positive integer. The novel system and method provides a low noise oscillator for operation at high frequencies and reduces oscillator phase noise in high Q implementations. The novel system and method also provides for reducing the aspect ratio of a 1/8 wavelength coaxial resonator by increasing in a stepwise manner the length of the coaxial resonator by n/2 wavelengths of the resonator frequency, where n is a positive integer. Furthermore, the novel system and method provides for reducing higher order modes in a 1/m wavelength coaxial resonator, operating at a high frequency, by increasing in a stepwise manner the length of the 1/m wavelength coaxial resonator by n/2 wavelengths of the resonator frequency, where n and m are positive integers.
1. A coaxial resonator for operation at a predetermined high frequencies comprising; a substantially conductive inner member and a substantially conductive outer member electrical connected by an conductive end member, wherein the conductive inner member and outer member are coaxial and are of a length approximately equal to (1/8+n/2) of the wavelength of the predetermined high frequency, wherein n is a positive integer.
2. The coaxial resonator according to claim 1 , wherein n=1.
3. The coaxial resonator according to claim 1 , wherein a dielectric material is located between the inner member and the outer member.
4. The coaxial resonator according to claim 3 , wherein the dielectric material is a ceramic material.
5. The coaxial resonator according to claim 1 , wherein the high frequency is greater than 3 GHz.
6. The coaxial resonator according to claim 1 , wherein the high frequency is greater than 5 GHz.
7. The coaxial resonator according to claim 1 , wherein the high frequency range is between 3 GHz and 5 GHz.
8. The coaxial resonator according to claim 1 , wherein the high frequency range is between 20 GHz and 30 GHz.
9. The coaxial resonator according to claim 1 , wherein the high frequency is 30 GHz or greater.
10. A Low Noise oscillator for operation at high frequencies comprising a coaxial resonator, wherein the coaxial resonator is a (1/8+n/2)λ wavelength resonator, wherein n is a positive integer and λ is the operating wavelength.
11. The low noise oscillator according to claim 10 , wherein n=1.
12. The low noise oscillator according to claim 10 , wherein a dielectric material is located between the inner member and the outer member.
13. The low noise oscillator according to claim 12 , wherein the dielectric material is a ceramic material.
14. The low noise oscillator according to claim 10 , wherein the high frequency is greater than 3 GHz.
15. The low noise oscillator according to claim 10 , wherein the high frequency is greater than 5 GHz.
16. The low noise oscillator according to claim 10 , wherein the high frequency range is between 3 GHz and 5 GHz.
17. The low noise oscillator according to claim 10 , wherein the high frequency range is between 20 GHz and 30 GHz.
18. The low noise oscillator according to claim 10 , wherein the high frequency is 30 GHz or greater.
19. The low noise oscillator according to claim 10 , wherein the high frequency range is 5 GHz or greater.
20. In a method of reducing Oscillator phase noise in high Q implementations, the improvement of using a (1/8+n/2)λ wavelength coaxial resonator, resonating at a high frequency, as the resonator, wherein n is a positive integer and λ is the high frequency wavelength.
21. The method according to claim 20 , wherein n=1.
22. The method according to claim 20 , wherein the high frequency is greater than 3 GHz.
23. The method according to claim 20 , wherein the high frequency is greater than 5 GHz.
24. The method according to claim 20 , wherein the high frequency range is between 3 GHz and 5 GHz.
25. The method according to claim 20 , wherein the high frequency range is between 20 GHz and 30 GHz.
26. The method according to claim 20 , wherein the high frequency is 30 GHz or greater.
27. The method according to claim 20 , wherein the high frequency range is 5 GHz or greater.
28. A method of increasing the aspect ratio of a 1/8 wavelength coaxial resonator, resonating at a high frequency comprising the step of increasing the length of the coaxial resonator by n/2 wavelengths of the resonator frequency, where n is a positive integer.
29. The method according to claim 28 , wherein n=1.
30. The method according to claim 28 , wherein the high frequency is greater than 3 GHz.
31. The method according to claim 28 , wherein the high frequency is greater than 5 GHz.
32. The method according to claim 28 , wherein the high frequency range is between 3 GHz and 5 GHz.
33. The method according to claim 28 , wherein the high frequency range is between 20 GHz and 30 GHz.
34. The method according to claim 28 , wherein the high frequency is 30 GHz or greater.
35. The method according to claim 28 , wherein the high frequency range is 5 GHz or greater.
36. In a method for reducing higher order resonance modes in a 1/m wavelength oscillator, operating at a high frequency, the improvement comprising increasing the length of the 1/m wavelength coaxial resonator by n/2 wavelengths of the resonator frequency, where n and m are positive integers.
37. The method according to claim 36 , wherein n=1.
38. The method according to claim 36 , wherein the high frequency is greater than 3 GHz.
39. The method according to claim 36 , wherein the high frequency is greater than 5 GHz.
40. The method according to claim 36 , wherein the high frequency range is between 3 GHz and 5 GHz.
41. The method according to claim 36 , wherein the high frequency range is between 20 GHz and 30 GHz.
42. The method according to claim 36 , wherein the high frequency is 30 GHz or greater.
43. The method according to claim 36 , wherein the high frequency range is 5 GHz or greater.