Direction Finders TRIZ Cases

Virtual antenna extrapolation extends a small radar array to separate nearby targets, improve DOA resolution, and avoid grating lobes.

Controlled beam jitter lets a single phased array synthesize monopulse error signals for fast LEO satellite tracking while maintaining the RF link.

Switching from AoA to corrected ToA at large elevation angles cuts phase-difference error and improves positioning accuracy.

Multiple antennas estimate target signal direction and strength, enabling low-cost autonomous navigation and obstacle avoidance without cameras or radar.

Compensating gain and phase errors in radar antenna arrays improves multi-target DoA estimation accuracy without excessive search complexity.

A 2D transmit-receive data matrix lets automotive radar jointly estimate DoA and DoD in multipath, improving angular resolution at lower cost.

Direction-specific phase shifting lets a 1D antenna array resolve 3D arrival-direction ambiguity without a complex 2D layout.

Phase hypothesis regions and weighted phasor combining resolve sparse-array DoA ambiguity while improving angle accuracy and SNR.

Non-uniform antenna spacing resolves angle-of-arrival ambiguity at high frequencies while reducing array size and element count.

Selected candidate AoAs are sent with the measured angle so the location server can resolve antenna-spacing ambiguity with lower signaling overhead.

Shared receiver circuits process multiple radar antenna signals while compensating switching lag to reduce circuit scale, power use, and angle errors.

UWB anchors fuse TWR and TDoA with geofencing to detect people near vehicle blind spots within 50 cm and up to 50 m away.

Non-uniform element spacing avoids dense λ/2 layouts, improving angle-of-arrival accuracy with fewer elements and shorter arrays.

This radar case applies SVD directly to sparse-array MIMO measurements to separate targets under coherent signals and single snapshots.

A radar device angle measurement unit processes sum and difference signals from multiple subarray antennas to perform beamforming.

A minimum distance search technique compares signal samples against principal component tables for rapid direction finding.

A multi-baseline interferometry system aggregates Gaussian conditional probabilities to resolve phase wrapping ambiguity in angle of arrival estimation.

Weighted signal components isolate the first arrival path phase to estimate angle of arrival, mitigating multipath interference.

A phased array antenna system uses step scanning and particle swarm optimization to rapidly locate low orbit satellites.

A pseudo-doppler antenna array with software-defined radio detects signal angles and characterizes wireless channels.

Processor estimates direction of arrival from chirp sequences to resolve grating lobe errors in non-uniform antenna arrays.

The radar system identifies occupied spectral regions in the 76 GHz to 81 GHz band and switches to passive receive-only mode to eliminate interference.

Generating a third pulse signal with increased duty allows accurate identification of small overlap portions, resolving measurement precision trade-offs.

Summing phase shifts across multiple antenna pairs enables accurate direction of arrival detection without heavy computational resources.

A hybrid direction detection apparatus combines a log period antenna with two dipole antennas to determine wave signal source orientation.

Evidence grid calculates occupancy probabilities from interferometric radar signals to eliminate ghost targets caused by phase ambiguity.

Segmenting angle estimation into iterative hypothesis selection resolves phase ambiguity in collocated MIMO radar arrays while reducing compute complexity.

A vehicle radar sensor detects objects by listening for third-party radar signals reflected from surrounding traffic.

Signal processing unit divides azimuth frequency signals to extract radio wave source information without phase data.