Frequency detector with power combiner dividers

Gruchala, H.; Rutkowski, A.

doi:10.1109/75.668701

Cited by 15 publications

(10 citation statements)

References 2 publications

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“…There are so-called single-function discriminators. These are systems with one microwave element of power splitting and one element of microwave signals' vector summation 4,11,12 . They can be used where precision is not a main requirement but size of device is the more important parameter.…”

Section: Introductionmentioning

confidence: 99%

Integrated microwave frequency discriminator with rat-race 3dB hybrids

Rutkowski¹,

Stadnik²

2020

Radioelectronic Systems Conference 2019

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Section: Introductionmentioning

confidence: 99%

Integrated microwave frequency discriminator with rat-race 3dB hybrids

Rutkowski¹,

Stadnik²

2020

Radioelectronic Systems Conference 2019

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“…Conventional Instantaneous Frequency Measurement (IFM) receivers have been widely used in electronic warfare, communication systems, weapon guidance systems, and radar monitoring [Collins and Grant, 1981;East, 2012;Goddard, 1972;Gruchala and Rutkowski, 1998;Kopp, 1988]. Recently, IFM receivers have found new applications in areas such as unmanned aerial vehicles, signals intelligence, electronic intelligence, electronic support measures, and automated test equipment [Drummond et al, 2009;Sullivan, 2010;Li et al, 2011;Li et al, 2012;Lu et al, 2013;Niu et al, 2011;Sarkhosh et al, 2008;Wei et al, 2012;Zhang and Pan, 2013;Zhou et al, 2010].…”

Section: Introductionmentioning

confidence: 99%

Four‐bit reconfigurable discriminator for frequency identification receivers: A building block approach

et al. 2016

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This paper presents a building block approach to design a reconfigurable discriminator (RD), which is the core circuit in frequency identification receivers. The RD is used to identify an unknown signal; the output of the circuit determines a frequency subband where the unknown signal falls into. The proposed building block design approach is scalable and can be used to produce any multibit RD. This design approach can be used to produce RD circuits with more or less resolution for a fixed band of operation, according to the number of bits used for a given design. The building block approach is demonstrated through the design of a 4‐bit RD. This design is a two‐port device that provides a series readout and can produce 4 bits for frequency identification. The device operates from 1 to 4 GHz, implemented by microstrip lines and PIN diode switches. Simulated and measured responses are in agreement.

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“…Secondly, such a topology does not require "crossovers" of transmission lines. Apart from making the structure simpler, this helps in minimizing interference generated from such a "cross-over" [7], [8]. Thirdly, the proposed topology consists of power splitter and coupler, as opposed to other four-port circuits such as Mohr discriminator which uses only couplers [9].…”

Section: Introductionmentioning

confidence: 99%

“…As opposed to the four-port circuit, the six-port circuit helps in reducing this quadrature error by generating output voltages which are sine and cosine (i.e., in quadrature) of the input phase deviation. However, calibration and digital postprocessing help in reducing this measurement error to almost 1% even for the case of four-port circuits [8], thus making it an interesting trade-off over the six-port circuit for rapid sensing of the spectrum in cognitive radio applications. Fig.…”

Section: Introductionmentioning

confidence: 99%

A wide dynamic range four-port spectrum sensor for cognitive radio

Chatterjee

Blau

Hein

2015

2015 German Microwave Conference

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This paper presents a compact, low-cost spectrum sensor with very large dynamic range, to detect arbitrarily modulated input signals with respect to identifying the spectrum holes available for cognitive radio applications. The sensing technique is based on the combination of a tunable pre-selector filter with a four-port circuit consisting of logarithmic detectors. Since the four-port is a passive circuit, the sensed signal is processed without requiring additional power consuming nonlinear circuits (like mixers and their necessary local oscillator driver circuits). Additionally, the four-port circuit consumes less schematic area as compared to other delay line based spectrum sensors e.g., six-port circuits. Also, the use of logarithmic detectors enables the detection of signals over a wide dynamic range exceeding 80 dB, making it almost comparable to that of commercially available heterodyne receivers. Such a technique provides a fast, low-cost and low-power sensing strategy, therefore making it an extremely interesting alternative to present heterodyne receivers used for rapid wide-band sensing, which is a key pre-requisite for cognitive radio applications.

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Frequency detector with power combiner dividers

Cited by 15 publications

References 2 publications

Integrated microwave frequency discriminator with rat-race 3dB hybrids

Integrated microwave frequency discriminator with rat-race 3dB hybrids

Four‐bit reconfigurable discriminator for frequency identification receivers: A building block approach

A wide dynamic range four-port spectrum sensor for cognitive radio

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