A dual six-port with homodyne phase-sensitive detectors as new option of microwave network analyzer

Galwas, B.A.; Palczewski, S.; Pienkowski, Z.

doi:10.1109/cpem.1996.547370

Cited by 4 publications

(1 citation statement)

References 2 publications

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“…The homodyne technique has extremely high performance [6] relative to the other methods. Single and dual six-port homodyne network analyzers operating around 1 GHz have been realized [7,8]. On the other hand, a six-port network analyzer using single six-port junction is a low-cost system [9].…”

Section: Introductionmentioning

confidence: 99%

A homodyne five‐port network analyzer operating in the W‐frequency band

Chahine

Huyart

2004

Micro & Optical Tech Letters

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both stubs are approximately an eighth of a wavelength long at the fundamental frequency. This configuration provides a large phase gradient, thus improving the phase-noise performance of the circuit. Additionally, the fundamental signal can be coupled out with a variable coupling factor by tapping the short stub. As described above, the phase condition is enforced by an appropriate coupling line at the base of the devices. The resulting layout is very compact, as the maximum line length in the design is an eighth of a wavelength.Critical parts of the circuit are characterised by an electromagnetic simulation in order to take additional parasitic elements into account. Further parasitic coupling is minimised by an appropriate layout. RESULTSThe output spectrum of the oscillator at the push-push output was measured using a WR-10 waveguide measurement system. The output power was determined by calibrating the system for frequencies above 110 GHz by measurements with a power sensor. The resulting spectrum is depicted in Figure 2. An output power of about 0 dBm at 124.7 GHz is measured. This performance is achieved at a low power consumption of only 70 mW. The phase noise can be estimated from the measured spectrum to be about Ϫ94 dBc/Hz at 1-MHz offset, which is a very low value for this frequency range.The simulation yields an output power of 0.7 dBm at an oscillation frequency of 124.4 GHz for the identical configuration. Phase noise is simulated to be Ϫ98 dBc/Hz at 1-MHz offset. These results demonstrate that first-pass design success can be achieved for fully integrated circuits, even in the F-band, with accurate device models, additional consideration of parasitic elements by electromagnetic simulations, and a careful layout. CONCLUSIONA SiGe HBT push-push oscillator developed for the 122-GHz ISM frequency band has been presented with both simulated and experimental results. The measured data demonstrate that the most advanced SiGe processes with f T in the 200-GHz range are feasible for applications in the higher mm-wave range, up to frequencies beyond 100 GHz.

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Section: Introductionmentioning

confidence: 99%

A homodyne five‐port network analyzer operating in the W‐frequency band

Chahine

Huyart

2004

Micro & Optical Tech Letters

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Six‐Port Networks

Xu,

Wu,

Bosisio

2005

Encyclopedia of RF and Microwave Engineering

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Software‐defined radio (SDR) has been identified as a potential method to enhance flexible wireless communication systems. The operation speed of an analog/digital converter (ADC) and processing ability of digital signal processing (DSP) chips are key factors in the development of SDR for useful commercial applications. More recent advances in semiconductor processing technology and the development of reconfigurable devices such as digital signal processors and field‐programmable gate arrays (FPGAs) reduce the development time of commercial products. SDR in conjunction with six‐port receivers has promising applications for use in wireless LANs, audio and television broadcasting, and interoperability between different radio services, as seen by new studies on the use of six‐port technology in various design aspects of a new SDR receiver. The objective is to realize an application of SDR to provide a multichannel, multimode wireless direct digital receiver. The combination of SDR and six‐port technology provides great flexibility in system configuration; significant reduction in hardware cost, particularly at millimeter‐wave frequencies; and potential for software reuse. The six‐port receiver approach offers wideband accommodation to ever‐changing communication specifications required in a SDR as much of its functionality is defined in software. Different types of six‐port circuits have been designed, with center frequencies at 2.4, 5.8, 24, and 28 GHz, operating over wide frequency bands. Some six‐port circuits are based on microstrip structures and are fabricated with hybrid microwave integrated circuit (MHMIC) or monolithic microwave integrated circuit (MMIC) technology at both microwave and millimeter‐wave frequencies. Other circuits use a novel substrate‐integrated waveguide (SIW) structure allowing integration of planar integrated circuit structure with waveguide structure. The performances of these six‐port circuits in digital receivers are reported in relation to signal modulation schemes, noise performance analysis calibration, and coding. Bit error rate simulation and measurement results obtained with demodulation algorithms are given for QPSK and QAM‐16 signals under a variety of operating conditions. Initial results show promising applications of six‐port technology for direct digital conversion demodulation reception, needed in future low‐cost SDR communication systems. Measurement and simulated demodulation results obtained with coding algorithms are also given.

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Calibration procedure and experimental results of a dual six-port network analyzer with phase-sensitive homodyne detectors

Pienkowski

12th International Conference on Microwaves and Radar. MIKON-98. Conference Proceedings (IEEE Cat. No.98EX195)

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A dual six-port with homodyne phase-sensitive detectors as new option of microwave network analyzer

Cited by 4 publications

References 2 publications

A homodyne five‐port network analyzer operating in the W‐frequency band

A homodyne five‐port network analyzer operating in the W‐frequency band

Six‐Port Networks

Calibration procedure and experimental results of a dual six-port network analyzer with phase-sensitive homodyne detectors

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