Integrated transmitter circuit for multiport reconfigurable antenna

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Journal Title
Journal ISSN
Volume Title
Sähkötekniikan korkeakoulu | Master's thesis
Date
2017-05-22
Department
Major/Subject
Micro- and Nanoelectronic Circuit Design
Mcode
ELEC3036
Degree programme
NanoRad - Master’s Programme in Nano and Radio Sciences (TS2013)
Language
en
Pages
57+6
Series
Abstract
This master’s thesis was a part of an academic research projecta where the target is to design an integrated circuit (IC) to dynamically tune the operating frequency of a transmitter antenna. A multiport antenna model was provided by Prof. Viikari’s group who recently presented a novel idea of multiport antenna tuning. In this concept the multiport antenna feeds are excited with weighted signals having certain amplitudes and phases, thus leading to antenna tuning at the desired operating frequency. However, it is not feasible to dynamically scale the antenna feeding signal amplitudes and phases with discrete electronics. Therefore, the system on chip solution (SoC) approach was studied in this thesis. Initially, the concept was studied on theoretical level and with circuit simulations. The tuning analysis framework was developed to scrutinize the antenna weighted signal characteristics. This analysis provides the two most important specifications for the IC i.e., the accuracy required for on-chip amplitude and phase tuning. For the antenna under consideration, the on chip phase and amplitude tuning system have 6 bit and 3 bit scaling resolutions respectively. The tuning system is designed for a 4-port reconfigurable antenna where each antenna feed has a separate phase tuning and amplitude tuning block. The tuning system was simulated along the 4-port antenna at 2 GHz, and the simulation result validates the multiport tuning concept. This novel integrated tuning system is scalable as well as capable of tuning any reconfigurable multiport antenna.
Description
Supervisor
Ryynänen , Jussi
Thesis advisor
Stadius, Kari
Keywords
transmitter, integrated circuit, multiport antenna, antenna tuning
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