Codesign of an impulse generator and miniaturized antennas for IR-UWB

Generation of Power-Efficient FCC-Compliant UWB Waveforms Using FBGs: Analysis and Experiment

“…3, FBG1 is used to flatten the source spectrum, therefore, its ideal transfer function is otherwise (4) where is the desired bandwidth around . Of course, a real FBG cannot follow exactly the desired profile in (4). The error between the target spectral profile defined in (4) and the fabricated FBG1 spectral response should be minimized by choosing an appropriate apodization profile.…”

“…Pulse shaping is integrated into the mixer, performing upconversion, and shaping in one circuit. In [4], an overall design of pulse generator and transmit antenna is proposed. They designed a chip to generate Gaussian monocycle pulses with pulse position modulation (PPM) modulation.…”

Integration of a Pulse Generator on Chip Into a Compact Ultrawideband Antenna

“…Based on our previous positive experience with differential feeding of the antenna summarized in [10] we decided to implement the same feeding scheme in our new design. As shown in Fig.…”

“…This was investigated in [8], [9]. To avoid use of balun in our previous paper [10] we investigated differential feeding of the antennas by a generator with differential outputs via a double semi-rigid cable, resulting in an improved match of the generator and the antenna, an improved magnitude response and reduced ringing of the radiated pulse. Presence of the transmission lines between the generator and antenna remains however a bottle-neck of the matching procedure and increases a total volume of the front-end.…”

Future Trends on Nanoantennas Synthesis

“…In particular, in the field of Ultrawideband (UWB) communication devices ([1], [2]), of smart miniature sensors ("smart dust") [3] and of nanodevices, the compactness of the transmitter is a key issue since usually such systems may employ a wavelength much larger than the device itself [4]. In fact, although resonant half-wavelength dipoles or quarter-wavelength monopoles could be acceptable for some applications employing centimeter and millimeter waves, modern compact devices require the use of the so called "electrically small antennas" (e.g., [5], [6]), which are radiating structures smaller than a quarter-wavelength.…”