Create a custom cardioid microphone, and plot the power response pattern at 500 and 800 Hz.
Model and visualize a variety of antenna array geometries with Phased Array System Toolbox™. These geometries can also be used to model other kind of arrays, such hydrophone arrays and
Form an antenna array with a custom antenna radiation pattern and then analyze the array's response pattern. Such a pattern can be either from measurement or from simulation.
A self calibration procedure based on a constrained optimization process. Sources of opportunity are exploited to simultaneously estimate array shape uncertainties and source
Model amplitude, phase, position and pattern perturbations as well as element failures in a sensor array.
Uses infinite array analysis to model large finite arrays. The infinite array analysis on the unit cell reveals the scan impedance behavior at a particular frequency. This information is
Introduces the basic concept of polarization. It shows how to analyze the polarized field and model the signal transmission between polarized antennas and targets using Phased Array
Use pilot calibration to improve the performance of an antenna array in the presence of unknown perturbations.
Model subarrays, commonly used in modern phased array systems, using Phased Array System Toolbox™ and perform analyses.
Model a 77 GHz 2x4 antenna array for Frequency-Modulated Continuous-Wave (FMCW) radar applications. The presence of antennas and antenna arrays in and around vehicles has become a
The pattern multiplication principle states that the radiation pattern of an array can be considered as the multiplication of the element pattern and the array factor. However, when an
Apply tapering and model thinning on different array configurations. It also demonstrates how to create arrays with different element patterns.
Construct an omnidirectional microphone element having a response within the human audible frequency range of 20 to 20,000 Hz. Baffle the microphone response for azimuth angles outside of
Design a backbaffled isotropic antenna element and obtain its response. First, construct an X-band isotropic antenna element that operates from 8 to 12 GHz setting the Backbaffle property
Models a tracking radar based on a 31-by-31 (961-element) uniform rectangular array (URA). The radar is designed to follow a moving target. At each time instant, the radar points in the known
Set up a rectangular array containing linear subarrays. The example also finds the phase centers of the subarrays.
Plot the grating lobe diagram for an 11-by-9-element uniform rectangular array having element spacing equal to one-half wavelength.
Construct a narrowband collector that models a plane wave impinging on a two-element uniform linear array. The array has an element spacing of 0.5 m (default for a ULA). The operating
Construct an antenna with a cosine-squared response in both azimuth and elevation. The operating frequency range of the antenna is 1 to 10 GHz. Plot the 3-D antenna response at 5 GHz.
Plots the right-handed and left-handed circular polarization components of fields generated by a crossed-dipole antenna at 1.5 GHz. You can see how the circular polarization chnages from
Compute the steering vector for a 4-element ULA at an operating frequency of 1 GHz. Assume that the waveform is incident on the array from 45° azimuth and 10° elevation.
Arrange copies of a linear subarray in a triangular layout.
When you create antenna arrays such as a uniform linear array (ULA), you can use antennas that are built into Phased Array System Toolbox™. Alternatively, you can use Antenna Toolbox™
Create a uniform rectangular array (URA) and obtain information about the element positions, the array response, and inter-element time delays. Then, simulate the reception of two sine
Construct a backbaffled isotropic antenna element with a uniform frequency response over a range of azimuth angles from [-180,180] degrees and elevation angles from [-90,90] degrees. The
Simulate the reception of a 100-Hz sine wave modulated by a carrier frequency of 1 GHz at a 4-element ULA. Assume the angle of arrival of the signal is (-90;0) .
The Sensor property of a phased.Collector System object™ can specify a single antenna element. In this example, create a custom antenna element using the phased.CustomAntennaElement
Create and view a ULA having four isotropic antenna elements separated by 0.5 meters
Construct a four-element ULA with elements spaced at 0.25 m. Obtain the array magnitude response (absolute value of the complex-valued array response) for azimuth angles (-180:180) at 1
Computes the delay between elements of a 4-element ULA using the phased.ElementDelay System object™. Assume that the incident waveform satisfies the far-field condition. The delays are
Illustrates adding phase noise to a rectangular pulse waveform having five pulses. A random phase is added to each sample of the waveform. Compute the phase of the output waveform and compare
Arrange copies of a linear subarray to form a rectangular array.
Construct a radiator using a two-element ULA with elements spaced 0.5 meters apart (the default ULA). The operating frequency is 300 MHz, the propagation speed is the speed of light, and the
Compute the vertical and horizontal polarization components of the field created by a short-dipole antenna pointed along the z -direction. Plot the components as a function of elevation
Simulate the reception of a wideband acoustic signal by a single omnidirectional microphone element.
Plot the copolarization and cross-polarization signatures of the scattering matrix
Specify a phased.ReceiverPreamp System object™ with a gain of 20 dB, a noise figure of 5 dB, and a reference temperature of 290 degrees kelvin.
Create a custom antenna element object. The radiation pattern has a cosine dependence on elevation angle but is independent of azimuth angle.
The effect of concentrating the cosine antenna response by increasing the exponent of the cosine factor. The example computes and plots the cosine response for exponents equal to 1 and 2 for a