Reverberation Chamber Low Frequency Field Uniformity Improvement with Conducting Pyramidal Structures
نویسندگان
چکیده
Reverberation chambers are commonly used in industry for measuring electromagnetic interference because they are cost-effective. We attempt to stir modes more evenly inside reverberation chambers by introducing passive field uniformity enhancement (PFUE) structures. These structures augment the existing rotating stirrers. Measured results for a 2.445 Х 2.475 Х 3.72 m reverberation chamber are presented. The results show that the inclusion of passive structures improves the field uniformity in the low 300 400 MHz band. The standard deviation of the electric field distribution in this band is improved by up to 0.93 dB. The PFUE structures also reduced the dynamic range, in the worst case, by 2 dB at high frequencies.
منابع مشابه
Optimization of Stirrer with Various Param- Eters in Reverberation Chamber
Reverberation chambers are widely used in electromagnetic compatibility test facilities because they provide a large working volume and are cheaper than other types of test facilities. In addition, they provide a statistically uniform field and generate a high maximum electric field within a relatively large volume. The volume of the cavity, the structure of the stirrer, and high tested frequen...
متن کاملMeasurement of sound power and absorption in reverberation chambers using energy density.
Reverberation chamber measurements typically rely upon spatially averaged squared pressure for the calculation of sound absorption, sound power, and other acoustic values. While a reverberation chamber can provide an approximately diffuse sound field, variations in sound pressure consistently produce uncertainty in measurement results. This paper explores the benefits of using total energy dens...
متن کاملDesign and Construction of a Small Reverberation Chamber
This paper describes the design of a small reverberation chamber. The lower usable frequency of the reverberation chamber designed in this paper is 2.3 GHz. The upper usable frequency depends on the conductivity of the walls and it is at least 18 GHz. The introduction gives basic information and usage of the reverberation chamber, while the theory is explained in the next section. Unlike other ...
متن کاملتحلیل آکوستیکی یک اتاق نیمه صامت با چینش متقاطع جاذب الیافی مکعب مستطیل
Introduction: The previous studies have used fibrous absorbents usually in the form of cone-shaped wedges for making anechoic and semi-anechoic chambers which their design and construction have been costly and difficult. The present study aimed to design a semi-anechoic chamber, using rectangular fibrous absorbents and also perform acoustic analysis for it. . Material and Method: In the presen...
متن کاملCharacterizing Large-Form-Factor Devices in a Reverberation Chamber
With new technologies such as machine-to-machine communications there is a growing need to test large-form-factor devices in reverberation chambers. The performance of the reverberation chamber can be affected by the physical characteristics of these devices. In this report it is discussed how the spatial uniformity of the received stirred power and the received total power (stirred + unstirred...
متن کامل