Low phase noise oscillator using a new planar hairpin resonator for X‐band applications. Issue 7 (26th April 2013)

• Record Type: Journal Article
• Authors: Shrestha, Bhanu; Yoon, Ki‐Cheol; Lee, Jeong‐Hun
• Is Part Of: Microwave and optical technology letters. Volume 55:Issue 7(2013:Jul.)
• Page Start: 1508
• Page End: 1511
• Publication Date: 2013-04-26
• Subjects: Microwaves -- Periodicals; Optics -- Periodicals; 621
• DOI: 10.1002/mop.27608
• Languages: English
• ISSNs: 0895-2477

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <p>This article proposed a new high loaded quality factor (<italic>Q</italic>_L) hairpin resonator with a combination of a stepped impedance resonator and single split ring resonator and its application to low phase noise oscillator for X‐band applications.A new resonator has a good characteristic of S‐parameter responses. The microwave oscillator is designed at 10 GHz that exhibited a low phase noise characteristic due to the high loaded <italic>Q</italic>_L of the new resonator. A series feedback network is used to generate the negative resistance to make oscillation. Experimental results of the microwave oscillator show the phase noise characteristic of −103.69 dBc/Hz at 100 kHz offset with output power of 15.56 dBm. The second harmonic suppression is −32.25 dBc, which is very important in wireless communication system. The figure of merit of the fabricated oscillator is −180 dBc/Hz. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1508–1511, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27608</p> </abstract>