Low Cost RF Amplifier for Community TV

International Conference on Engineering and Technology for Sustainable Development 2015

工业技术;经济学

Ch, Syafaruddin^1 ; Sasongko, Sudi Mariyanto Al^1 ; Suksmadana, I Made Budi^1 ; Muvianto, Cahyo Mustiko Okta^1 ; Ariessaputra, Suthami^1

Electrical Engineering Faculty of Engineering Mataram, University Majapahit, Street 62, Mataram, Indonesia^1

关键词: Average output power;    Average power;    Cad simulations;    Community TV;    Frequency ranging;    Input and outputs;    Low-cost design;    RF amplifiers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/105/1/012030/pdf
DOI  :  10.1088/1757-899X/105/1/012030

学科分类：工业工程学

来源: IOP

【 摘 要 】

he capability of television to deliver audio video makes this media become the most effective method to spread information. This paper presents an experiment of RF amplifier design having low-cost design and providing sufficient RF power particularly for community television. The RF amplifier consists of two stages of amplifier. The first stage amplifier was used to leverage output of TV modulator from 11dBm to enable to drive next stage amplifier. CAD simulation and fabrication were run to reach optimum RF amplifier design circuit. The associated circuit was made by determining stability circle, stability gain, and matching impedance. Hence, the average power of first stage RF amplifier was 24.68dBm achieved. The second stage used RF modules which was ready match to 50 ohm for both input and output port. The experiment results show that the RF amplifier may operate at frequency ranging from 174 to 230MHz. The average output power of the 2ndstage amplifier was 33.38 Watt with the overall gain of 20.54dB. The proposed RF amplifier is a cheap way to have a stable RF amplifier for community TV. The total budget for the designed RF amplifier is only a 1/5 compared to local design of final TV amplifier.