Predicting the effect of variations in ambient temperature and operating power on the response of a microwave filter

Rodriguez, L. M. de la Torre; Roger, Leonardo Lorenzo Bravo; Filho, José Pissolato; Iano, Yuso; Hernandez-Figueroa, Hugo E.; Sánchez-Soriano, Miguel Á.; Alves, A. A. C.

doi:10.1109/lapc.2016.7807574

Cited by 2 publications

(3 citation statements)

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“…Similarly, the dielectric constant of any capacitor or any PCB substrate is expressed as a function of temperature as follows [15] ε…”

Section: Theoretical Foundationmentioning

confidence: 99%

“…That is why, it is important to study the temperature effect on filter response once the satisfactory results are obtained at room temperature. In [14] and [15], two bandpass filter structures are considered to examine the temperature effect on their frequency responses. The vias used in these two-port designs create noise, and this noise varies with the operating temperature.…”

Section: Introductionmentioning

confidence: 99%

“…Another disadvantage of the design in [14] is that its center frequency shifts significantly with the change of operating temperature, and it needs an external temperature compensation system to stabilize it. On the other hand, only simulation results are available in [15] to show temperature effect on filter response whereas the design is not practically validated to support the simulation. The simulation results demonstrate that the resonant frequency shifts about 0.6% for only 49 • C variation in operating temperature.…”

Section: Introductionmentioning

confidence: 99%

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Temperature Effect on a Lumped Element Balanced Dual-Band Band-Stop Filter

Borah¹,

Kalkur²

2020

PIER M

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In this manuscript, the thermal effect on a lumped element balanced (differential) dualband band-stop filter (BSF) has been discussed in detail for the first time. The response of a novel filter should maintain consistency over a wide range of temperature. Although any microwave filter in general is designed for room temperature condition, the filter is employed for applications where the operating temperature constantly changes. Therefore, it is necessary to check the reliability of the filter response within a specific temperature range based on its application. Modern simulation software helps to make an initial assumption about the filter performance at different thermal conditions before its lab testing or actual application. Here, a quantitative analysis has been provided to show how change in temperature contributes to the change in each component value of a lumped element filter. This analysis is followed by a simulation to show that a balanced lumped element filter exhibits lower loss than its single-ended counterpart. Also, as the temperature varies, the balanced design demonstrates less deviation in the loss value than a two-port design. Next, a balanced dual-band BSF prototype with center frequencies 1.151 GHz and 1.366 GHz (25 • C) is characterized with a 4-port network analyzer under different temperature conditions. The experimental results exhibit a good match with the simulation results. For a variation of 80 • C in temperature, the maximum deviation obtained for the filter center frequency, absolute bandwidth (ABW), and insertion loss (Sdd21) are 5 MHz, 2.8 MHz and 2 dB, respectively.

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“…Similarly, the dielectric constant of any capacitor or any PCB substrate is expressed as a function of temperature as follows [15] ε…”

Section: Theoretical Foundationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%