Zobrazeno 1 - 10
of 37
pro vyhledávání: '"Leonard T. Hall"'
Autor:
Leigh E. Milner, Shyam G. Mehta, Leonard T. Hall, Simon J. Mahon, Sudipta Chakraborty, Michael C. Heimlich
Publikováno v:
2021 51st European Microwave Conference (EuMC).
Publikováno v:
2020 4th Australian Microwave Symposium (AMS).
A 0.13 SiGe upconverter circuit is presented that is suitable for use in broadband millimetre-wave transmitters and active phased arrays. The circuit accepts four differential IF inputs (I+, I−, Q+, Q−) in the frequency range of DC to 13 GHz. An
Publikováno v:
Microwave and Optical Technology Letters. 59:2710-2715
The functionality of a dual-band frequency-reconfigurable antenna based on a microstrip patch is extended toward independent tuning of its two operational bands. The antenna has distinct monopolar and broadside radiation patterns at its lower and upp
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 16:999-1002
The principle and experimental validation of a frequency- and polarization-reconfigurable antenna using switching PIN diodes is presented in this letter. The antenna is based on a center-fed circular cavity with switchable shorting vias along its out
Publikováno v:
IEEE Electron Device Letters. 37:1375-1378
A compact balanced frequency doubler with more than 35 dB odd-harmonic rejection and fractional bandwidth of 73% is presented in this letter. Wide bandwidth and high odd-harmonic suppression is achieved by adopting a new technique for the transformer
Publikováno v:
IEEE Transactions on Antennas and Propagation. 64:4877-4882
Two realizations of millimeter-wave (mm-wave) antennas with wideband and broad beam characteristics are introduced for flush integration in metallic structures. The antenna design exploits the half-mode substrate-integrated waveguide structure and it
Publikováno v:
IEEE Transactions on Antennas and Propagation. 64:883-893
Nonuniform leaky-wave antennas (LWAs) are analyzed and synthesized using a lossy transmission line model. The analysis is based on a general waveguide circuit theory. Compared to the classical approach, the model yields a higher accuracy in the compu
Publikováno v:
IEEE Antennas and Wireless Propagation Letters. 15:1955-1958
A frequency- and pattern-reconfigurable antenna based on a center-shorted microstrip patch is presented. The novel design utilizes two resonance modes of a microstrip antenna with shorting vias at the patch center. To set up the antenna tuning mechan
Publikováno v:
IEEE Transactions on Antennas and Propagation. 63:5235-5240
A stub-loaded microstrip patch antenna with reconfigurability in both frequency and polarization is presented. Using 12 varactors with two independent voltages, reconfigurability is achieved in a fractional bandwidth of around 40% while allowing sele
Publikováno v:
2017 IEEE International Symposium on Antennas and Propagation & USNC/URSI National Radio Science Meeting.
A pattern synthesis technique for a periodically stub-loaded half-mode substrate-integrated waveguide (HMSIW) leaky-wave antenna (LWA) is studied in this paper. In this structure, the waveguide host, i.e. the HMSIW, has a fixed cross-section whilst t