Development of a 500-MHz waveguide directional coupler with high directivity for HEPS

Luo, Yuanli; Li, Jian; Zhang, Pei; Ma, Qiang; Lin, Hang; Huang, Tong-Ming; Meng, F.; Zhao, Fei-Li; Deng, Ziwei

doi:10.1007/s41605-022-00323-7

Cited by 5 publications

(4 citation statements)

References 25 publications

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“…Commercial directional couplers typically achieve a directivity range of 20-30 dB, while some specially designed directional couplers can occasionally reach values of around 40 dB to meet scientific research measurement requirements. 14,15 However, designing such a single directional coupler for specific transmission line models, frequencies, and powers requires significant time and effort from researchers. Furthermore, changing application conditions necessitate redesigning, producing, and debugging, leading to a heavy scientific research and engineering burden.…”

Section: Introductionmentioning

confidence: 99%

“…The accuracy of RF signal measurements is often impacted by the core indicator, directivity, which is challenging to achieve the expected design goals due to varying levels of technical expertise and uneven processes. Commercial directional couplers typically achieve a directivity range of 20–30 dB, while some specially designed directional couplers can occasionally reach values of around 40 dB to meet scientific research measurement requirements 14,15 . However, designing such a single directional coupler for specific transmission line models, frequencies, and powers requires significant time and effort from researchers.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

Fanjian,

Liepeng,

Longbo

et al. 2024

Micro & Optical Tech Letters

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This letter presents a method for accurately calculating radio frequency (RF) power in a standing wave transmission line system. The proposed approach utilizes two directional couplers in conjunction with a low‐level radio frequency control system. RF power is determined through the application of proposed equations derived from amplitude and phase measurements of coupling signals obtained from the two directional couplers. Experimental validation of the method is conducted using two directional couplers with directivities of 26 and 28 dB, respectively, operating at 162.5 MHz across the entire wavelength. Results indicate that employing a single directional coupler yields average power errors of approximately 6.6% and 5.8%, respectively. However, by implementing the proposed method, the measurement error can be reduced to approximately 1.0%.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

Fanjian,

Liepeng,

Longbo

et al. 2024

Micro & Optical Tech Letters

View full text Add to dashboard Cite

show abstract

“…The accuracy of RF signal measurements is often impacted by the core indicator, directivity, which is challenging to achieve the expected design goals due to varying levels of technical expertise and uneven processes. Commercial directional couplers typically achieve a directivity range of 20 dB to 30 dB, while some specially designed directional couplers can occasionally reach values of around 40 dB to meet scientific research measurement requirements [9], [10]. However, designing such a single directional coupler for specific transmission line models, frequencies, and powers requires significant time and effort from researchers.…”

Section: Introductionmentioning

confidence: 99%

A method to enhance the accuracy of RF power measurements in particle accelerator high-frequency systems

Fanjian

2023

Preprint

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<p>This letter proposes a method for accurately calculating RF power at a standing wave (SW) transmission line system. It uses two directional couplers and a low-level radio frequency(LLRF) control system. The RF power is calculated from the proposed equations using amplitude and phase measurements of the coupling signals from the two directional couplers. The method is demonstrated adopting two directional couplers with directivity 26 dB and 28 dB respectively at 162.5 MHz over a whole wavelength range. The average power errors observed when using a single directional coupler are about 6.6% and 5.8% respectively, and the calculated power error can be reduced to about 1.0% through the proposed method.</p>

show abstract

“…The accuracy of RF signal measurements is often impacted by the core indicator, directivity, which is challenging to achieve the expected design goals due to varying levels of technical expertise and uneven processes. Commercial directional couplers typically achieve a directivity range of 20 dB to 30 dB, while some specially designed directional couplers can occasionally reach values of around 40 dB to meet scientific research measurement requirements [9], [10]. However, designing such a single directional coupler for specific transmission line models, frequencies, and powers requires significant time and effort from researchers.…”

Section: Introductionmentioning

confidence: 99%

A method to enhance the accuracy of RF power measurements in particle accelerator high-frequency systems

Fanjian

2023

Preprint

View full text Add to dashboard Cite

show abstract

Development of a 500-MHz waveguide directional coupler with high directivity for HEPS

Cited by 5 publications

References 25 publications

A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

A method to enhance the accuracy of radio frequency power measurements in particle accelerator high‐frequency systems

A method to enhance the accuracy of RF power measurements in particle accelerator high-frequency systems

A method to enhance the accuracy of RF power measurements in particle accelerator high-frequency systems

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