Timed Arrays

LIST OF FIGURES

Chapter 1

1.1	(a) Green Bank Telescope reflector [4] (Courtesy of NRAO). (b) PAVE PAWS radar [5] (Courtesy of BMDO).
1.2	Four different geometrical layouts of an array: (a) linear array, (b) planar array, (c) conformal array, and (d) random array.
1.3	Concept of an antenna phase center.
1.4	Three different element lattices and corresponding unit cells.
1.5	Generic array architecture.
1.6	Two signals adding in and out of phase.
1.7	Pulse dispersion: (a) Two identical pulses (coherent) added together. (b) Two identical pulses (not coherent) that start at different times added together. (c) Two identical pulses (coherent) that start at different times are added together.

Chapter 2

2.1	A stream of bits corresponds to a signal amplitude. The baseband signal modulates the carrier. Examples of OOK, BPSK, and QPSK are shown here.
2.2	OOK, BPSK, and QPSK with an SNR of 10 dB.
2.3	Pulse dispersion or spreading occurs when high frequencies are attenuated.
2.4	When the direct and attenuated reflected signal add together, the pulse is dispersed.
2.5	Wave polarization.
2.6	CP Gaussian pulse.

Chapter 3

3.1	Antenna far field definition.
3.2	Plane wave incident on linear array.
3.3	Array sampling of plane wave from broadside and endfire directions (a) θs = 0°, (b) θs = 90°, and (c) θs arbitrary.
3.4	Directivity of a linear uniform array as a function of element spacing for five different array sizes.
3.5	Directivity of a 10 × 10 planar uniform array as a function of element spacing for square and triangular ...