Efficient Power Combining

Dydyk, M.

doi:10.1109/mwsym.1979.1124051

Cited by 10 publications

(28 citation statements)

References 2 publications

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“…result in large chip area and more design effort. To solve these issues, several open-loop CR schemes were proposed in the literature [3,4].…”

Section: Received 5 November 2009mentioning

confidence: 99%

“…The nonreturn-to-zero (NRZ) format, commonly used for both continuous-and burst-mode optical communications, does not contain the clock information (or clock tone) at the frequency of data bit-rate [3]. This challenges the open-loop CR schemes.…”

Section: Received 5 November 2009mentioning

confidence: 99%

“…This challenges the open-loop CR schemes. To overcome this difficulty, the existing approaches intentionally inserted either optical components [3] or electrical circuit blocks [4]. These extra components or blocks incurs extra cost and design complexity.…”

Section: Received 5 November 2009mentioning

confidence: 99%

“…Because a single active component, such as a single oscillator or power amplifier (PA), can not handle such high power, the power combining techniques are usually adopted to combine the output powers of the multiple active components to obtain the high-power microwaves or millimeter waves. Techniques for device-and circuitlevel combining were thoroughly researched and extensively reviewed in [1][2][3]. However, the ohmic losses of the combining and matching circuit networks in these systems reduce the combining efficiency, blocking the output power to be improved further.…”

Section: Introductionmentioning

confidence: 99%

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Gain factor of horn array feed offset parabolic cylindrical reflector antenna for spatial power combining

Xie

Zhang

2010

Micro & Optical Tech Letters

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A study on the horn array feeding offset parabolic cylindrical reflector antenna for spatial power combining is presented. The calculations based on the aperture integral method are agreed well with the measurements. The relationship between the gain factor and the dimensions of the antenna is analyzed. The optimal dimensions and orientation of the feeding horn as well as the optimal spread angle of the reflector are given. It is revealed that the gain factor of the antenna with an E_plane array feed is higher than that of the antenna with an H_plane array feed.

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“…result in large chip area and more design effort. To solve these issues, several open-loop CR schemes were proposed in the literature [3,4].…”

Section: Received 5 November 2009mentioning

confidence: 99%

Section: Received 5 November 2009mentioning

confidence: 99%

Section: Received 5 November 2009mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Gain factor of horn array feed offset parabolic cylindrical reflector antenna for spatial power combining

Xie

Zhang

2010

Micro & Optical Tech Letters

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“…A variety of power combining schemes have been described in the literature [1][2][3][4][5][6][7][8][9][10][11][12]. Some groups obtained higher power by coherently summing power from several identical input channels in circuitcombining structures [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Spatial Microwave Power Combining With Anisotropic Metamaterials

Wang¹

2011

PIER

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Abstract-This paper proposes a novel approach for the spatial microwave power combining. Anisotropic metamatierials are employed to trim the combined electrical fields and form a single beam radiation pattern. The radiation characteristics of a binary horn antennas array are investigated both numerically and experimentally at 12 GHz. The results show that much higher combining efficiency can be achieved. Given a designed combining efficiency, the strict relative position requirements in each transmission unit are reduced in this scheme.

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Association Between Mental Health and Reproductive System Disorders in Women

et al. 2023

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ImportanceReproductive system and mental health disorders are commonly comorbid in women. Although the causes of this overlap remain elusive, evidence suggests potential shared environmental and genetic factors associated with risk.ObjectiveTo investigate the comorbidity between psychiatric and reproductive system disorders, both as broad diagnostic categories and among specific pairs of diagnoses.Data SourcePubMed.Study SelectionObservational studies published between January 1980 and December 2019 assessing prevalence of psychiatric disorders in women with reproductive system disorders and prevalence of reproductive system disorders in women with psychiatric disorders were included. The study did not include psychiatric and reproductive disorders triggered by life events (eg, trauma, infection, surgery) to address potential confounding.Data Extraction and SynthesisA search yielded 1197 records, of which 50 met the inclusion criteria for the qualitative and 31 for the quantitative synthesis in our study. A random-effects model was used for data synthesis and Egger test and I2 to assess study bias and heterogeneity. Data were analyzed from January to December 2022. This study followed the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) guideline.Main Outcomes and MeasuresPsychiatric and reproductive system disorders.ResultsA total of 1197 records were identified, of which 50 met the inclusion criteria for qualitative and 31 for quantitative synthesis. Diagnosis of a reproductive system disorder was associated with a 2- to 3-fold increased odds of having a psychiatric disorder (lower bound odds ratio [OR], 2.00; 95% CI, 1.41-2.83; upper bound OR; 2.88; 95% CI, 2.21-3.76). The analysis focused on specific diagnoses described in the literature and found that polycystic ovary syndrome was associated with increased odds of depression (population-based studies OR, 1.71; 95% CI, 1.19-2.45; clinical studies OR, 2.58; 95% CI, 1.57-4.23) and anxiety (population-based studies OR, 1.69; 95% CI, 1.36-2.10; clinical studies OR, 2.85; 95% CI, 1.98-4.09). Chronic pelvic pain was also associated with both depression (OR, 3.91; 95% CI, 1.81-8.46) and anxiety (OR, 2.33; 95% CI, 1.33-4.08). Few studies investigated risk of other reproductive system disorders in women with psychiatric disorders, or reverse associations (risk of reproductive system disorder among women with a psychiatric diagnosis).Conclusions and RelevanceIn this systematic review and meta-analysis, a high rate of reported co-occurrence between psychiatric and reproductive disorders overall was observed. However, data for many disorder pairs were limited. The available literature focused overwhelmingly on affective disorders in polycystic ovary syndrome, overlooking a substantial portion of disease overlap. As such, the associations between the majority of mental health outcomes and conditions of the female reproductive system are largely unknown.

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Efficient Power Combining

Cited by 10 publications

References 2 publications

Gain factor of horn array feed offset parabolic cylindrical reflector antenna for spatial power combining

Gain factor of horn array feed offset parabolic cylindrical reflector antenna for spatial power combining

Spatial Microwave Power Combining With Anisotropic Metamaterials

Association Between Mental Health and Reproductive System Disorders in Women

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