X-band low-phase noise oscillator employing substrate integrated waveguide dual-mode filter

作者：Yang, Ziqiang^*; Luo, Bangyu; Dong, Jun; Yang, Tao

来源：Electronics Letters, 2015, 51(6): 494-U168.

DOI：10.1049/el.2014.4106

• forward error correction
• parity check codes
• automatic repeat request
• optimisation
• AWGN channels
• energy efficiency optimization
• LDPC coded chase combining HARQ system
• LDPC coded chase combining hybrid automatic repeat request system
• additive white Gaussian noise channel
• AWGN channel
• maximum transmission number
• transmit power reduction
• threshold signal-to-noise ratio
• SNR
• forward error correction code
• FEC
• retransmission number
• equal transmit power optimisation

A novel low-phase noise oscillator employing a substrate integrated waveguide (SIW) dual-mode bandpass filter as a frequency stabilisation element within its feedback loop is proposed. The SIW dual-mode filter is implemented based on the use of the two degenerate modes (TE102 and TE201) and has a larger group delay peak than the conventional SIW cavity resonator. By taking advantage of the large group delay peak, the phase noise of the oscillator has significant improvement. An X-band oscillator with a GaAs HEMT packaged transistor has been designed and measured. At an oscillation frequency of 9.04 GHz, the measured phase noise is -111.9 dBc/Hz at 100 kHz offset. The output power is 6.1 dBm and the figure of merit is -198 dBc/Hz.

• 出版日期2015-3-19
• 单位电子科技大学