A wideband converter of the main mode of the coaxial line into the lowest symmetric mode of a circular waveguide

Bykov, D. N.; Bykov, N. M.; Klimov, A. I.; Kurkan, I. K.; Rostov, V. V.

doi:10.1134/s0020441208050126

Cited by 7 publications

(7 citation statements)

References 1 publication

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“…Figure 1 (d) shows the diffraction-limited electromagnetic fields at the focal plane. The electric field polarized along the radial direction can be picked up by coaxial horn antennas [86,87]. Receiver designs based on microwave and submillimeter astronomy projects could be considered for signal collection.…”

Section: Dark Matter Signalmentioning

confidence: 99%

Broadband solenoidal haloscope for terahertz axion detection

Liu,

Dona,

Hoshino

et al. 2021

Preprint

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Section: Dark Matter Signalmentioning

confidence: 99%

Broadband solenoidal haloscope for terahertz axion detection

Liu,

Dona,

Hoshino

et al. 2021

Preprint

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“…Whereas, the next order mode 𝑇 𝑀 01 has the circular symmetric field pattern as Figure 5. Furthermore, if the feed antennas are designed as in [14], [15], the antennas can be inserted inside the waveguide and directly connected to the inner conductor of the coaxial cable. Since these antennas are in the form of round shape, an analogy antenna design is reasonable for applications with data transmission inside the rotatable CPT strings.…”

Section: Single Mode Selection For Data Transmission In Cpt Applicationsmentioning

confidence: 99%

In-Pipe Wireless Communication for Underground Sampling and Testing

Nguyen¹,

Meratnia

et al. 2017

GLOBECOM 2017 - 2017 IEEE Global Communications Conference

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In this paper, we present an effective and low-cost wireless communication system for extremely long and narrow pipes that can replace the extant wire system in underground sensor network applications such as soil sampling and testing with the Cone Penetration Test (CPT), the most widely used underground sensor device. Different from existing in-pipe wireless techniques, we consider real-world pipelines that are very narrow and long. In particular, in our design data are first modulated at a commercial frequency and then converted to high frequency, between 14 − 15 GHz, to be transmitted along of the pipelines under the circular waveguide mode TM01. Especially, we design a cone-shaped antenna to overcome the aligning problem of feeds between the transmitter and receiver. To evaluate the applicability and efficiency of our design, we conduct realistic simulations as well as experiments with real prototypes. The results of experiments are consistent with our theoretical design and simulations and show that our proposed wireless system can transfer sensory data up to 20 m in narrow CPT pipes with a diameter of 17 mm when using the LoRa modulation with a transmitting power of 1 W, whereas existing underground radio techniques can transfer data from a depth of 2 m at maximum in the same condition. In our approach, it is also possible to add repeaters to extend the communication range when needed.

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“…On the other hand, the characteristics were discussed for some potential applications [8]. To widen the bandwidth, conical coaxial line and tapered cylindrical horn was reported for radiation applications [9]. Using multistage impedance transformer to achieve bandwidth extension was a common way [10,11], while the multistage can also be approximated as a cone to realize the same purpose [12].…”

Section: Introductionmentioning

confidence: 99%

An in-line coaxial-to-circular waveguide transition at X band

Xia

et al. 2020

Journal of Electrical Engineering

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A wideband transition from the coaxial TEM mode to the TM01 mode of the circular waveguide with in-line input-output architecture is proposed in this paper. The transition employs multi-stage stepped impedance transformer to achieve wideband responses. Both mode transition and impedance matching characteristics are discussed in the paper. A demonstrator is developed and validated experimentally. As compared with some recently published reports, a better performance is observed. Moreover, the developed transition could facilitate the mechanical fabrication more easily. It can be found wide applications such as the circular waveguide based slot array antenna, the nondestructive detection, cracks inside the conductive pipes, and so on.

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A wideband converter of the main mode of the coaxial line into the lowest symmetric mode of a circular waveguide

Cited by 7 publications

References 1 publication

Broadband solenoidal haloscope for terahertz axion detection

Broadband solenoidal haloscope for terahertz axion detection

In-Pipe Wireless Communication for Underground Sampling and Testing

An in-line coaxial-to-circular waveguide transition at X band

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