Engineer Technical Support
Resume:
Resume
Basic Info.
Name:
Tong-Hao Liu
Gender:
Male
Date of Birth:
Residency:
Beijing
Years of Experience:
> 15 years
Email:
accwtz@r.postjobfree.com
Mobile Tel:
Current Salary:
320,000RMB /year
Height:
170cm
Marital Status:
Married
Religion:
Christian
Address:
Room 302, Unit 2, Building 13, Long Teng Yuan 2 Qu, Hui Long Guan, Chang Ping, Beijing
Postal Code:
102208
Skype:
liutonghao
QQ:
732529097
Self Assessment
Very strong study ability; innovation ability; conscientious; faith; loyal.
Familiarly use CST, PowerSI, PowerDC, ADISimPLLs, Microwave Office, ADS, HFSS, SysCal, AppCAD, etc.
Familiarly use Zuken and Altium to design PCB layout.
Familiarly use various RF test equipments, such as CMU200, CMW500, oscilloscope, power meter, signal generators, spectrum analysis, network analysis, Noise Figure Meter, source analyzer.
I am an advanced member of www.edaboard.com. My name is “tony_lth” in the forum. By Jan. 6th, 2014, I have posted 1541 messages in the forum, and helped others 331 times, and my level is 23th in the forum.
Career Objective
I can start:
within 1 month
Type of Employment:
Full-time
Desired Salary:
Negotiable/Month
Desired Position:
Hardware Engineer; Communication Engineer; RF / Microwave /Radar Engineer
Work Experience
2012/5--Present: Nokia (China) Investment Co., Ltd(1000-5000 people)
Industry:
Telecom Operators/Service Providers
Windows Phone RD Hardware Integration Expert
As a Hardware Integration Expert for Lumia series Windows Phone.
1. Solved Lumia 920T ESD issue
2. Solved Luma 925T EMC issue, 2nd harmonics radiation issue
3. Provide a solution for solving the TDMA noise issue for Lumia series
4. Solved Lumia 625 audio THD issue
5. Solved Lumia 520 speaker circuit issue
6. Lead Lumian 925 antenna tuner tuning, EPCOS antenna tuner
7. As a hardware technical leader, lead hardware engineering on one new Windows Phone program. Modify the schematics of the whole phone, and discuss the performance with sub-function engineers, such as BB, RF, EMC, Audio, UI, Antenna, and MECH, etc.
2010/5--2012/4: Beijing Metstar Radar Co., Ltd(150-500 people)
Industry:
Radar
R&D Department RF engineer
Beijing Metstar Radar Company is a joint venture of Lockheed Martin Company and China Meteorology Agency.
1. I have successfully designed one frequency source generator for X-Band weather radar. The phase noise is -115dBc/Hz@1KHz at 9.4GHz. And I can improve the phase noise at least 3dB.
2. I have designed two X band LNAs, and the noise figure is less than 1.1dB from 9.1GHz to 9.7GHz, and the gain is more than 36dB.
3. I have designed the receiver for X band radar, the whole system noise figure is less than 3dB (from LNA input to AD output), and the sensitivity is -110dBm (pulse width 1us) of the whole radar, and the linearity dynamic range of the whole radar system is more than 86dB.
4. I have successfully designed three frequency source generators for C-Band weather radar. The phase noise is -122dBc/Hz@1KHz at 5.6GHz. And I can improve it at least 3dB.
5. I have designed six C band LNAs, and the noise figure is less than 1.0dB from 5.2GHz to 5.8GHz, and the gain is more than 35dB.
6. I have designed the receiver for C band radar, the whole system noise figure is less than 3dB (from LNA input to AD output), and the sensitivity is -110dBm (pulse width 1us), and the linearity dynamic range of the whole radar system is more than 97dB. The dynamic range of my designed analog channel of the receiver is more than 110dB.
7. I have designed the receiver for C band DUAL-CHANNEL radar, the whole system noise figure is less than 3dB (from LNA input to AD output), and the sensitivity is -110dBm (pulse width 1us), and the linearity dynamic range of the whole radar system is more than 86dB. And Std ZDR is less than 0.2dB for SNR between 85dB and 0dB.
8. I have designed LNA for GPSMET system, the noise figure is less than 1.1dB, and the gain is more than 30dB. And the MP1&MP2 is comparable to the Leica GPSMET LNA, and is better than Trimbler GPSMET LNA. Note: GPSMET system is using GPS signal to forecast weather.
2006/6--2010/4: Beijing Skyway Technologies Co., Ltd(150-500 people)
Industry:
Telecom & Network Equipment
Microwave R&D RF engineer
1. Designed LO & LNA & PA modules for 18GHz/23GHz/26GHz/38GHz SDH & PDH microwave Point-to-Point telecommunications Outdoor Units;
2. My designed 38G SDH system receiver, the sensitivity is better than -72dBm at STM1 mode. And the LO phase noise is better than -76dBc/Hz@10KHz from 37.2GHz to 39.7GHz.
3. I had designed a 4G VCO with -102dBc/Hz@10KHz phase noise.
4. I had designed a DRO (13GHz) with -92dBc/Hz@10KHz phase noise, and the output power is more than +10dBm.
5. In 18G SDH, I had designed a TX system, which can support 256QAM/28MHz SDH microwave link, in various weather conditions. Especially the last stage PA is combined by two MMIC PA chips, to improve the maximum output power, and maintain linearity and OIP3 performance.
6. And I had designed various system specifications, such as the budgets of the gain, noise figure, linearity, Phase noise, Freq Plan, Power Plan of the link.
7. Support products type approvals in Brazil for 1 month.
2005/2--2006/3: Ericsson (China) Communications Company, Ltd(1000-5000 people)
Industry:
Telecom & Network Equipment
WCDMA RAN 2nd line technical support
Configure and trouble-shooting RAN, including RNC, RXI, RBS for WCDMA
Achievements:
I had joined more than 10 projects.
2003/10--2005/1: Innovation-works Company
Industry:
Computers, Software
Technical Depart. Technical Support/Maintenance Engineer
Technical Support (mainly on presale): make presentation on CAI software function, TRIZ, Ontology, Patent Search in Database, and propose to our software develop, and test the beta version of our software;
Achievements:
Make presentation more than 50 times; Training customers more than 10 times.
1999/9--2003/10: State Intellectual Property Office (China)
Industry:
Government/Public Service
Mobile Telecomm Patent Examination Unit, EE Depart Patent Substance Examiner
Examine the substance of invention patent
Achievements:
Examined more than 300 patents;
Familiar with China Patent Law, Rules, PCT, patent written, etc;
1998/4--1999/8: Lucent Technologies (China)
Industry:
Computers, Software
Wireless Telecomm Technical Support/Maintenance Engineer
Post-sale Technical Support for CDPD
Achievements:
Installation, configuration, test, maintenance of the CDPD networks.
1996/4--1998/4: Huatong Company
Industry:
Computers, Software
System System Manager/Webmaster
System administrator for VSAT & LAN networks.
Achievements:
No system mal-function for 2 years.
Project Experience
1992/9 -- 1994/7 :
Using millimeter wave resonant cavity measures dielectric
Project Description:
This is a China national 863 project.
Responsibility:
Programming the measurement software with C++, and test & verify the results.
Education
1993/9 – 1996/3, Beijing University of Posts & Telecommunications,
Major: Electromagnetic Fields and Microwave Technologies (Satellite Telecomm)
Degree: Master.
Thesis Title: Analysis the Orbits & Radio Channels of Mobile Satellite telecommunications Systems.
1989/9 – 1993/7, Beijing University of Posts & Telecommunications,
Major: Electromagnetic Fields and Microwave Technologies
Degree: Bachelor
863 Project: Using millimeter wave resonant cavity measures dielectric.
Training
2009/8 -- 2009/8
China Electrical Academy
Signal Integrity & EMC for high speed PCB Layout
Language Skills
English(Excellent):
Listening & Speaking(Very Good), Reading & Writing(Excellent)
Grade of English:
CET 6
TOEFL:
567
Miscellaneous Info.
Religion:
I am a Christian, and I believe that "Work not only for money, but also for the name of Jesus."
As the first author, published the following papers:
1. "A new software for matching circuit design", Telecomm and calculation technologies journal, Dec. 2012, Tong-hao Liu.
2. “Using Mixer as frequency doubler”, Telecomm and calculation technologies journal, Sep. 2011, Tong-hao Liu.
3. "Phase noise effect on BER of microwave point-to-point telecomm", Telecomm and calculation technologies journal, Mar. 2011, Tong-hao Liu.
4. "Using PIN diode as frequency multiplier in Radar System", Telecomm and calculation technologies journal, Jun. 2010, Tong-hao Liu.
5. “Optimize Orbital Altitude of LEO/MEO-Satellite Communication Networks”, Tong-hao Liu & Zhen-guo Chen, pp255-259, Proceedings of 1995 International Conference on Radio Science (Chinese Journal of Radio Science, August, 1995)
6. “Analysis Main Parameters of Mobile Satellite Communication Systems”, Journal of Beijing Univ. of Posts and Telecomm., Tong-hao Liu & Zhen-guo Chen, No.11, 1995
Granted Patents as the 1st inventor:
The following patents granted by China State Patent Office (SIPO):
1. 200720170337.2 The RF unit of the PLL & RF circuit with co-plane, Granted on May. 28, 2008
2. 200720187224.3 The RF unit of 23G PDH PTP ODU, Granted on Jul. 23, 2008
3. 200720187231.3 The RF unit of 38G PDH PTP ODU, Granted on May. 28, 2008
4. 200720187230.9 The RF unit of 26G PDH PTP ODU, Granted on Aug. 20, 2008
5. 200*********.X Micro-strip to waveguide converter probe, Granted on Oct. 15, 2008
6. 200720190676.7 The RF unit of 18G PDH PTP ODU, Granted on Nov. 12, 2008
7. 200920110125.4 The duplexer and RF unit connected by the waveguide, Granted on May. 12, 2010
8. 201220253177.9 IF Fine (0.01dB) Adjustable Attenuator, Granted on Feb. 13, 2013
9. 201220283980.7/201210199749.4 A dual band LNA and a dual and receiver
Contact this candidate