Filters play a critical role in mitigating signal interference and allowing coexistence between bands In today's spectrally-crowded mobile environment. Designing form-factor filter solutions with low passband insertion loss and sufficient stopband rejection requires a design flow that supports filter synthesis through physical realization and verification. The NI AWR Design Environment platform addresses all stages and types of filter development, from lumped-element or distributed filters to more complex multiplexed, high-power, and high-Q cavity filters. (Image courtesy of Jobson Consulting)
Accelerate design starts with powerful synthesis of lumped and distributed filter types.
Accurately predict the response of distributed and cavity-type filters with planar method-of-moments (MoM) and 3D finite-element method (FEM) electromagnetic (EM) analysis.
Directly import synthesized designs into Microwave Office circuit design software for further refinement, optimization, EM verification, and physical design.
Passive component designs start with the selection of an appropriate medium such as microstrip, stripline, or monolithic microwave integrated circuit (MMIC) printed-circuit boards (PCBs) for the target application, frequency of operation, and performance targets. Physical dimensions are dictated for classic distributed designs by the wavelength of the operating frequency, which can be determined through an RF-aware transmission-line calculator.
Libraries of surface-mount technology (SMT) vendor components and distributed transmission-line elements allow designers to build and simulate passive components for physical realization through a schematic editor fully-synchronized to a layout editor. Parameterized EM subcircuits can be used for novel structures to develop passive components using custom building blocks.
Designers rely on circuit/EM co-simulation to provide embedded parasitic extraction and design verification, along with RF-aware circuit simulation and frequency-dependent transmission-line models. Prior to manufacture, component performance can be verified through planar or 3D EM analysis, depending on the geometry of the (packaged) device.
The NI AWR Design Environment platform provides a single, complete design environment that seamlessly integrates simulation and design technologies and manages the circuit/system/EM components within a project, supporting schematic design entry and fully-synchronized physical design and layout to define an antenna design and related RF circuitry
The iFilter™ synthesis wizard within NI AWR software accelerates design starts, enabling engineers to create lumped-element and distributed filters based on user-defined filter responses. The descriptive interface guides users through realizable filters and options and supports low-pass, high-pass, bandpass, and bandstop filters.
Microwave Office circuit design software enables designers to develop impedance-matching networks and antenna feed structures with RF/microwave linear circuit simulation, distributed transmission lines, and vendor component libraries, as well as design aids such a network synthesis (optional), optimization, and tuning.
The AXIEM 3D proprietary full-wave planar EM simulator is based on method-of-moments (MoM) fast-solver technology that readily analyzes planar antennas and arrays. Designers can extract S-parameters for voltage standing-wave ratio (VSWR), return loss and radiation patterns, and visualize currents to gain insights on coupling and the behavior of resonant structures.
Analyst™ 3D finite-element method (FEM) EM analysis enables designers to model arbitrary 3D structures such as horn and helix antennas, extract S-parameters for VSWR/return loss and radiation patterns, and visualize EM fields and currents.
Visual System Simulator™ system design software, inclusive of the phased-array generator wizard, enables designers to quickly configure planar phased-array or MIMO-array systems, interactively modify designs to achieve the desired behavior, and then generate system diagrams and/or circuit schematics and EM structures for further, more rigorous analysis. VSS software supports interactive specification of the layout, feed network settings, element antenna and RF link settings, gain tapers, and element failures.