A Compact Harmonic Radar System at 61/122 GHz ISM Band for Physiological Joint Angle Estimation

Orth, Alexander; Kwiatkowski, Patrick; Hansen, Steffen; Müller, Katharina; Flores, Francisco Geu; Heitzer, Falko; Mayer, Constantin; Jäger, Markus; Prokscha, Andreas; Pohl, Nils

doi:10.23919/eurad54643.2022.9924907

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Advantageously, frequency doubling is easily realizable even at millimeter-wave (mmwave) frequencies by Gilbert-cells or push-pull-doublers [15]. Medical applications, as presented in [16], can utilize that approach directly, thanks to the location of the ISM bands at 61/122 GHz [17]. In our case, the harmonic frequencies from 152 to 162 GHz are not licensed for automotive applications.…”

Section: Introductionmentioning

confidence: 99%

Connecting the Automotive Bands of Present and Future With a Tag for Inharmonic Radar at 76–81/134–141 GHz

Braun,

Schöpfel,

Bredendiek

et al. 2024

IEEE Microw. Wireless Tech. Lett.

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Vulnerable road users like pedestrians, pedal-, and motorcyclists have accounted for an increasing proportion of traffic fatalities in the last 15 years. Simultaneously, harmonic radar systems have been implemented for applications where distinction between specific targets and surrounding clutter is required. However, the doubled frequencies conventionally used in harmonic radar systems are not licensed for automotive applications. Connecting the 76-81 GHz automotive band with the 134-141 GHz currently going through regulation instead necessitates what we propose to call inharmonic radar. Therefore, an innovative frequency modulation instead of doubling is required. This modulation is achieved and presented in this work with an active tag based on a novel 1.75 times fractional frequency multiplier. It successfully implements the required frequency conversion upward of -53 dBm of input power with undesired spectral components suppressed by more than 20 dB.

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Section: Introductionmentioning

confidence: 99%

Connecting the Automotive Bands of Present and Future With a Tag for Inharmonic Radar at 76–81/134–141 GHz

Braun,

Schöpfel,

Bredendiek

et al. 2024

IEEE Microw. Wireless Tech. Lett.

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“…The harmonic radar is a radar system that detects, judges, and identifies nonlinear targets by transmitting fundamental wave signals and receiving the Nth harmonics or combined echo signals of the target's re-radiation [1][2][3][4]. Most electronic products exhibit nonlinear characteristics, and harmonic radar can classify nonlinear targets in complex environments based on their radiation characteristics [5,6].…”

Section: Introductionmentioning

confidence: 99%

Design of harmonic radar based on dual-transmitter and dual-receiver mechanism

wang,

Yin,

et al. 2024

Third International Conference on Electronic Information Engineering, Big Data, and Computer Technology (EIBDCT 2024)

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Harmonic radar is a kind of radar that uses the higher-order harmonics reflected by the target for nonlinear target detection. Eavesdropping equipment usually has non-linear devices, so harmonic radar can be used in the field of anti-investigation to detect voice recorders and eavesdroppers. In this paper, a kind of harmonic radar based on dual-transmitter and dualreceiver is designed to meet the needs of anti-investigation of eavesdropping equipment, and three kinds of electronic targets such as recording pen are tested and verified. The verification results show that the device can detect nonlinear electronic targets well.

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Introducing Inharmonic Radar: Tag Detection in the Automotive Bands of Present and Future at 76–81/134–141 GHz via Fractional Multiplication

Braun,

Schöpfel,

Bredendiek

et al. 2024

IEEE J. Microw.

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A Compact Harmonic Radar System at 61/122 GHz ISM Band for Physiological Joint Angle Estimation

Cited by 3 publications

References 7 publications

Connecting the Automotive Bands of Present and Future With a Tag for Inharmonic Radar at 76–81/134–141 GHz

Connecting the Automotive Bands of Present and Future With a Tag for Inharmonic Radar at 76–81/134–141 GHz

Design of harmonic radar based on dual-transmitter and dual-receiver mechanism

Introducing Inharmonic Radar: Tag Detection in the Automotive Bands of Present and Future at 76–81/134–141 GHz via Fractional Multiplication

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