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Questions related from Ll Lee
I have observed varying bonding strengths between PDMS (100um) and polyimide film (50um) at different mixing ratios. The plasma power is 10 W, the time is 40s, air is oxygen. When using a 1:10...
05 March 2025 4,365 1 View
The RFID chip absorbs RF power from the RFID reader through the antenna. The RF power rectified by the rectifier and power up the core of the RFID chip. Then, the chip transmits the information...
05 December 2020 412 6 View
For example, the antenna in this paper is very small. Can it be even smaller (such as
28 July 2020 8,901 8 View
I had found some literature that develops MEMS stress sensor (CMOS, N-MOS, P-MOS). However, I can't find commercial solutions for this type of sensor. Is there any replacement? (Stress...
22 May 2020 6,513 6 View
The circuit is a voltage doubler, the diodes are sms7630. The reverse breakdown voltage of sms7630 is 2V. In ADS simulation, the output voltage never exceeds 2V. However, in practice, I can get...
19 December 2019 4,200 4 View
Working on rf energy harvesting(915MHz). I had try to match the impedance of antenna to the rectifier using a mini VNA. After measuremet, I got the impedance of the antenna....
12 July 2019 4,292 13 View
I am working on rf energy harvesting. Now, a problem occurs. Breifly describe the circuit. Antenna--Rectifying circuit--Storage capacitor-- DC-DC converter--Load. Now, it seems that the UVLO...
16 June 2019 3,231 11 View
The patch antenna is directive. Is there any commercial patch antenna (915MHz) which can be used for rf enery harvesting? I had found some by google but they are for rfid purpose.
11 June 2019 7,071 5 View
In this article, after impedance matching, Vin decreases significantly though Vout increases. And Vout/Vin is not equal to 2. Why? DESIGN OF RF TO DC RECTIFIER AT GSM BAND FOR ENERGY HARVESTI...
11 April 2019 1,281 5 View
I am designing a rectifier for rf energy harvesting . I am trying to use haramonic analysis to find out the input impedance of the rectifier at 91MHz, 10dbm. But I am a beginner and there is no...
05 April 2019 3,151 4 View
The model of the dipole antenna consists of a source and two separated wires. The electrons flow alternatively in the wires, generating electromagnetic waves. However, in practice, I found that...
01 January 1970 5,428 5 View
A typical wheastone bridge consists of 4 resistor is amplified by a instrumentation amplifier and an ADC reads the output value. It is required to work under the exposure of UHF signal (900MHz...
01 January 1970 9,998 3 View
