BESLEME VE RF GİRİŞ GÜCÜ ŞARTLARININ WİMAX GÜÇ YÜKSELTECİ PERFORMANS PARAMETRELERİNE OLAN ETKİSİNİN İNCELENMESİ

Abstract

Bu çalışmada 50MHZ-6GHz frekans aralığında çalışan SBB5089Z Güç Yükselteci (GY) modülünün, RF giriş gücü (P_giriş) -20dBm’den 10dBm’e kadar 2dB’lik artış ile ve besleme gerilim değerleri (V_DC) 0V’dan 5V’a kadar 75mV’luk adımlarla değiştirilmiştir. Çalışmada değişen V_DC ve P_giriş değerlerine göre P_çıkış, kazanç (G) ve eklenmiş güç verimliliği (EGV (%)) grafikleri 3.5GHz ve 5.8GHz WiMAX frekanslarında ayrı ayrı incelenmiştir. Değişen RF P_giriş ve V_DC değerlerine göre GY modülü P_giriş-V_DC’ye karşılık P_çıkış, G ve EGV (%) grafikleri ayrı ayrı incelenmiştir. GY modülü RF P_giriş koşulları manuel olarak RF sinyal jeneratörü ile DC gerilim değerleri ise Arduino’lu R/2R sayısal analog dönüştürücü (SAD) ve LM324 gerilim izleyici devresi kullanılarak değiştirilmiştir. Çalışmada elde edilen verilere göre 1dB kazanç sıkıştırma noktasına (P_1dB) kadar artırılan P_giriş değerlerine ve 5V’a kadar artırılan V_DC değerlerine göre GY P_çıkış, G ve EGV(%) davranışının olumlu yönde değiştiği gözlenmiştir.

Keywords

• WiMAX,Güç Yükselteci,RF Giriş Gücü,Besleme Koşulları,Arduino

INVESTIGATION OF THE EFFECT OF BIASING AND RF INPUT POWER CONDITIONS ON WIMAX POWER AMPLIFIER PERFORMANCE PARAMETERS

Abstract

In this study, DC conditions (V_DC) and RF input power (P_input) of SBB5089Z power amplifier (PA) module that operates 50MHZ-6GHz frequency interval, have changed. RF P_input have changed from -20dBm to 10dBm with 2dB steps, as well as V_DC has changed with 75mV steps-6 bit resolution- from 0V to 5V. P_output, gain (G) and power added efficiency (PAE (%)) have investigated graphically according to varying RF P_input and V_DC at 3.5GHz and 5.8GHz WiMAX frequencies. RF P_input of PA module conditions have manually changed with RF signal generator, as well as DC conditions have changed with Arduino biasing control unit which includes R/2R digital analog converter (DAC) and LM324 voltage follower. According to the data obtained in this study, it has been observed that behavior of P_output, G and EGV (%) have changed positively according to the increase of P_input up to 1dB gain compression point (P_1dB) and V_DC values increased up to 5V. 

Keywords

• WiMAX,Power Amplifier,RF Input Power,Biasing Conditions,Arduino

References

1. Chen, C., X. Xu, vd.., 2017. A 20–30 GHz high efficiency power amplifier IC with an adaptive bias circuit in 130-nm SiGe BiCMOS. Silicon Monolithic Integrated Circuits in RF Systems (SiRF), 2017 IEEE 17th Topical Meeting on, IEEE.
2. Chen, W., Z. Wang, vd., 2017. "4 - 20 GHz low noise amplifier MMIC with on-chip switchable gate biasing circuit." IEICE Electronics Express advpub.
3. Cho, Y., K. Moon, vd., 2016. Linear Doherty power amplifier with adaptive bias circuit for average power-tracking. Microwave Symposium (IMS), 2016 IEEE MTT-S International, IEEE.
4. Cripps, S. C., 2002. Advanced Techniques in RF Power Amplifier Design. Artech House.
5. Gecan, D., M. Olavsbraten, vd., 2016. Comprehensive investigation of a dynamic gate biasing technique for linearity improvement based on measurement of a 10 W GaN HEMT power amplifier. Telecommunications Forum (TELFOR), 2016 24th, IEEE.
6. Guo, Y. ve A. Zhu, 2017. Power adaptive decomposed vector rotation based digital predistortion for RF power amplifiers in dynamic power transmission. RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR), 2017 IEEE Topical Conference on, IEEE.
7. Ishikawa, S. H. a. R., 2017. Electrothermal Transient Analysis of GaN Power Amplifier With Dynamic Drain Voltage Biasing., IEEE Microwave and Wireless Components Letters vol. PP(no. 99): pp. 1-3.
8. Kaya A., Coskun. Ö., Ardıç S.,B., 2008. 2.4 GHz (WLAN) İçin A-Sınıfı Güç Yükseltici Tasarımı. Endüstri & Otomasyon Elektrik,Elektronik, Makina, Bilgisayar ve Kontrol Sistemleri Dergisi. 139: 22-25.

9. Lasser, G., M. Duffy, vd., 2017. Gate control of a two-stage GaN MMIC amplifier for amplitude and phase linearization. Wireless and Microwave Technology Conference (WAMICON), 2017 IEEE 18th, IEEE.
10. Lee, H., J. Kwon, vd., 2017. "Optimized Current of the Peaking Amplifier for Two-Stage Doherty Power Amplifier." IEEE Transactions on Microwave Theory and Techniques.
11. Lee, S., S. Lee, vd., 2017. A 1.7-GHz GaN MMIC Doherty power amplifier using an adaptive bias circuit with a quadrature coupler. Radio-Frequency Integration Technology (RFIT), 2017 IEEE International Symposium on, IEEE.
12. Mohamed, A. M., 2013. Adaptive Power Amplifiers for Modern Communication Systems with Diverse Operating Conditions Doctor of Philosophy, University of Waterloo
13. Kaya, A., Coşkun, Ö., 2013. "Single-Pole Double Throw Switches for 2.4 GHz Transceiver in Wireless Communication Applications." The Arabian Journal of Science and Engineering 38(12): 3421-3427.
14. O. Arı, Coşkun, Ö., A. Kaya, 2012. "Biyomedikal Uygulamalar İçin Ultra Geniş Bant (UWB) Anten Tasarımı Ve Analizi." Süleyman Demirel Üniversitesi, Teknik Bilimler Dergisi Cilt:2(Sayı:3): Sayfa:1-4.
15. Pedro, J. C. ve N. B. Carvalho, 2003. Intermodulation Distortion in Microwave and Wireless Circuits, ARTECH HOUSE.
16. Pozar, D. M., 2012. Microwave Engineering.
17. Prasad, K. M. ve H. Suresh, 2016. An efficient adaptive digital predistortion framework to achieve optimal linearization of power amplifier. Electrical, Electronics, and Optimization Techniques (ICEEOT), International Conference on, IEEE.
18. Songratthaset, D. ve S. Pattaramalai, 2017. Adaptive polynomials method for FBMC nonlinear power amplifier complex gain. Advanced Communication Technology (ICACT), 2017 19th International Conference on, IEEE.
19. Tsai, W.-T., C.-Y. Liou, vd., 2017. Wide-Bandwidth and High-Linearity Envelope-Tracking Front-End Module for LTE-A Carrier Aggregation Applications. IEEE Transactions on Microwave Theory and Techniques.
20. Vidojkovic, M., 2011. Configurable circuits and their impact on multi-standard RF front-end architectures Eindhoven University of Technology
21. Zhang, X. ve L. Siek, 2017. An 80.4% Peak Power Efficiency Adaptive Supply Class H Power Amplifier for Audio Applications. IEEE Transactions on Very Large Scale Integration (VLSI) Systems.
22. Zhao, S., vd., 2016. An adaptive polarization-QAM modulation scheme for improving the power amplifier energy efficiency in OFDM systems. Personal, Indoor, and Mobile Radio Communications (PIMRC), 2016 IEEE 27th Annual International Symposium on, IEEE.