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

Year 2017, Volume: 5 Issue: 3, 553 - 558, 18.12.2017

BİLGE Şenel , MESUD Kahriman , FATİH AHMET Şenel

https://doi.org/10.21923/jesd.341986

Cited By: 1

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

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