Novel tunable filter for millimeter-wave spectrum analyzer over 100 GHz

Kawamura, Takashi; Shimotahira, Hiroshi; Otani, Akihito

doi:10.1109/i2mtc.2013.6555494

Cited by 9 publications

(11 citation statements)

References 7 publications

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“…To verify the wide frequency tuning range technologies mentioned in the previous section, we designed FPW filter in real and tested its effect. In this design, the operation frequency bandwidth is 75 GHz to 110 GHz and the input/output plane is the waveguide of WR‐10, which are different from the previously reported FPW filter .…”

Section: Fpw Filter Design With Wider Tuning Range Technologiesmentioning

confidence: 85%

“…Furthermore, choke structure is constructed to prevent the leak of transmission wave from the gap between the outer waveguide and the movable waveguide, which is needed to move the inner waveguide. We reported FPW filter produced with this structure previously, and we have already achieved the frequency tuning range with the relative bandwidth of 24% (100 GHz to 140 GHz) .…”

Section: Operation Principle Of Fpw Filter and Challenge For Wide Frementioning

confidence: 89%

“…In the example shown in Fig. , the mirror has a structure with slit of 0.07 mm width in the direction of H‐plane on Si substrate coated with thin Au film. Here, it is defined that center frequency of desired transmission band is f c and wavelength inside waveguide is λ g .…”

Section: Operation Principle Of Fpw Filter and Challenge For Wide Frementioning

confidence: 99%

“…However, if frequency tuning range is further expanded, the change amount of L becomes larger, which results in a problem that resonant frequency appears within operation bandwidth. In this paper, we propose a novel method to solve these problems, and aim to realize even wider frequency tuning range than the previously reported FPW filter .…”

Section: Operation Principle Of Fpw Filter and Challenge For Wide Frementioning

confidence: 99%

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Frequency Tuning Range Expansion for the Millimeter‐Wave Band Tunable Filter

Kawamura

Otani

2016

Elect Comm in Japan

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SUMMARY For the realization of the smart community, the Internet of Things (IoT) and sensor technology in the millimeter‐wave band is necessary. The development of these technologies requires accurate spectrum analysis in the frequency domain over 100 GHz. A tunable preselection filter is a key device in building such a spectrum analyzer. In this paper, we propose use of a ridge waveguide to achieve frequency tuning over a wider bandwidth. In addition, we demonstrate an example design and prototype for a filter with a relative bandwidth of 38% (75 GHz to 110 GHz) and 32% (78.1 GHz to 107.5 GHz), respectively.

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Section: Fpw Filter Design With Wider Tuning Range Technologiesmentioning

confidence: 85%

Section: Operation Principle Of Fpw Filter and Challenge For Wide Frementioning

confidence: 89%

Section: Operation Principle Of Fpw Filter and Challenge For Wide Frementioning

confidence: 99%

Section: Operation Principle Of Fpw Filter and Challenge For Wide Frementioning

confidence: 99%

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Frequency Tuning Range Expansion for the Millimeter‐Wave Band Tunable Filter

Kawamura

Otani

2016

Elect Comm in Japan

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“…This proposed measurement system uses a mechanically tuned filter with Fabry-Perot resonator built into the waveguide as the pre-selector [4].…”

Section: Index Termsmentioning

confidence: 99%

Over 100 GHz millimeter-wave spectrum measurement system with pre-selector

Fuse

Kimura

Otani

2014

2014 IEEE MTT-S International Microwave Symposium (IMS2014)

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The recent start of R&D into Wireless Personal Networks (WPAN) and millimeter-wave wireless systems is creating an urgent need for development of a spectrum analyzer supporting accurate measurements in the frequency band above 100 GHz. However, there is no spectrum analyzer with a built-in pre-selector supporting spectrum analysis of wireless signals above 67 GHz. Such measurement is made generally by connecting a harmonic mixer or Block Down converter externally to a spectrum analyzer. In this case, generated unwanted signal components (spurious responses) are often seen during measurement, making it difficult to monitor the original signal components. This paper proposes development of a millimeter-wave spectrum measurement system incorporating a pre-selector function for wide dynamic range measurements with minimum unwanted signal components. We present the results of investigation into a prototype of the proposed system. We also measured a 120 GHz QPSK modulation wave to demonstrate the effectiveness of this system with pre-selector.

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Proposal of over 100‐GHz band waveguide switch

Kawamura

Mattori

2018

Electrical Engineering Japan

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A filter bank consisting of switches and band‐pass filters is one method for configuring a spectrum analyzer preselector. A long‐life switch with high isolation is key to this development. We propose a novel horizontal‐moving waveguide switch designed for easy addition of ports compared to commercial rotating switches. The switch has a small gap between the fixed and moving parts with the gap surrounded by chokes. This configuration offers high isolation and long life. It also reduces the size of the filter bank. This paper describes 2 proposed switch prototypes for frequency ranges from 90 to 140 GHz and from 255 to 315 GHz. The measured switch isolation is better than 50 dB and the insertion loss is less than 3 dB for both prototypes.

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Novel tunable filter for millimeter-wave spectrum analyzer over 100 GHz

Cited by 9 publications

References 7 publications

Frequency Tuning Range Expansion for the Millimeter‐Wave Band Tunable Filter

Frequency Tuning Range Expansion for the Millimeter‐Wave Band Tunable Filter

Over 100 GHz millimeter-wave spectrum measurement system with pre-selector

Proposal of over 100‐GHz band waveguide switch

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