scholarly journals First harmonic injection locking of 24-GHz-oscillators

2003 ◽  
Vol 1 ◽  
pp. 197-200
Author(s):  
M. R. Kühn ◽  
E. M. Biebl
Keyword(s):  
Harmonic Oscillator ◽  
Output Power ◽  
Low Cost ◽  
Frequency Stability ◽  
Injection Locking ◽  
Stable Operation ◽  
Automotive Radar ◽  
Locking Range ◽  
Harmonic Injection ◽  
24 Ghz

Abstract. An increasing number of applications is proposed for the 24 GHz ISM-band, like automotive radar systems and short-range communication links. These applications demand for oscillators providing moderate output power of a few mW and moderate frequency stability of about 0.5%. The maximum oscillation frequency of low-cost off-theshelf transistors is too low for stable operation of a fundamental 24GHz oscillator. Thus, we designed a 24 GHz first harmonic oscillator, where the power generated at the fundamental frequency (12 GHz) is reflected resulting in effective generation of output power at the first harmonic. We measured a radiated power from an integrated planar antenna of more than 1mW. Though this oscillator provides superior frequency stability compared to fundamental oscillators, for some applications additional stabilization is required. As a low-cost measure, injection locking can be used to phase lock oscillators that provide sufficient stability in free running mode. Due to our harmonic oscillator concept injection locking has to be achieved at the first harmonic, since only the antenna is accessible for signal injection. We designed, fabricated and characterized a harmonic oscillator using the antenna as a port for injection locking. The locking range was measured versus various parameters. In addition, phase-noise improvement was investigated. A theoretical approach for the mechanism of first harmonic injection locking is presented.

scholarly journals A varactor tuned low-cost 24 GHz harmonic VCO

2006 ◽  
Vol 4 ◽  
pp. 21-24 ◽  
Author(s):  
M. O. Olbrich ◽  
L. Huang ◽  
E. M. Biebl
Keyword(s):  
Harmonic Oscillator ◽  
Output Power ◽  
Tuning Range ◽  
Low Cost ◽  
The Other ◽  
High Output Power ◽  
Wide Tuning Range ◽  
Output Frequency ◽  
24 Ghz ◽  
High Output

Abstract. We present a low-cost 24 GHz VCO that is based on a microstrip design combined with discrete packaged devices. The output frequency is generated by a harmonic oscillator. The tunabilty was reached using a varactor diode. Two versions of the VCO were built, one has a wide tuning range of 1.1 GHz and the other one has a high output power of 3.7 dBm.

Low-cost fully integrated BiCMOS transceiver for pulsed 24-GHz automotive radar sensors

2008 ◽  
Author(s):  
L. Moquillon ◽  
P. Garcia ◽  
S. Pruvost ◽  
S. Le Tual ◽  
M. Marchetti ◽  
...  
Keyword(s):  
Low Cost ◽  
Automotive Radar ◽  
Fully Integrated ◽  
Radar Sensors ◽  
24 Ghz

0.16-0.25 pJ/bit, 8 Gb/s Near-Threshold Serial Link Receiver With Super-Harmonic Injection-Locking

2012 ◽  
Vol 47 (8) ◽  
pp. 1842-1853 ◽  
Author(s):  
Kangmin Hu ◽  
Rui Bai ◽  
Tao Jiang ◽  
Chao Ma ◽  
Ahmed Ragab ◽  
...  
Keyword(s):  
Injection Locking ◽  
Serial Link ◽  
Harmonic Injection ◽  
Near Threshold

A Low-Power Low-Cost 24 GHz RFID Tag With a C-Flash Based Embedded Memory

2014 ◽  
Vol 49 (9) ◽  
pp. 1942-1957 ◽  
Author(s):  
Hadar Dagan ◽  
Aviv Shapira ◽  
Adam Teman ◽  
Anatoli Mordakhay ◽  
Samuel Jameson ◽  
...  
Keyword(s):  
Low Power ◽  
Low Cost ◽  
Embedded Memory ◽  
Rfid Tag ◽  
24 Ghz

scholarly journals Industrial Gas Turbine Uprates: Tips, Tricks and Traps

1997 ◽  
Author(s):  
T. L. Ragland
Keyword(s):  
Gas Turbine ◽  
Output Power ◽  
Gas Turbines ◽  
Customer Value ◽  
Low Cost ◽  
Pressure Ratio ◽  
Original Design ◽  
Advantages And Disadvantages ◽  
Industrial Gas Turbine ◽  
Cycle Efficiency

After industrial gas turbines have been in production for some amount of time, there is often an opportunity to improve or “uprate” the engine’s output power or cycle efficiency or both. In most cases, the manufacturer would like to provide these uprates without compromising the proven reliability and durability of the product. Further, the manufacturer would like the development of this “Uprate” to be low cost, low risk and result in an improvement in “customer value” over that of the original design. This paper describes several options available for enhancing the performance of an existing industrial gas turbine engine and discusses the implications for each option. Advantages and disadvantages of each option are given along with considerations that should be taken into account in selecting one option over another. Specific options discussed include dimensional scaling, improving component efficiencies, increasing massflow, compressor zero staging, increasing firing temperature (thermal uprate), adding a recuperator, increasing cycle pressure ratio, and converting to a single shaft design. The implications on output power, cycle efficiency, off-design performance engine life or time between overhaul (TBO), engine cost, development time and cost, auxiliary requirements and product support issues are discussed. Several examples are provided where these options have been successfully implemented in industrial gas turbine engines.

scholarly journals W-band voltage-controlled oscillator design in 130 nm SiGe BiCMOS technology

2019 ◽  
Vol 30 ◽  
pp. 01006
Author(s):  
Alexander Kozhemyakin ◽  
Ivan Kravchenko
Keyword(s):  
Power Consumption ◽  
Output Power ◽  
Design Flow ◽  
Voltage Controlled Oscillator ◽  
Automotive Radar ◽  
W Band ◽  
Bicmos Technology ◽  
Sige Bicmos ◽  
Fundamental Oscillation ◽  
Simulation Results

The paper presents design flow and simulation results of the W-band fundamental voltage-controlled oscillator in 0.13 μm SiGe BiCMOS technology for an automotive radar application. Oscillator provides fundamental oscillation range of 76.8 GHz to 81.2 GHz. According to simulation results phase noise is –89.3 dBc/Hz at 1 MHz offset, output power is –5.6 dBm and power consumption is 39 mW from 3.3 V source.

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