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Recent content by Guruditya Sinha

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    ESD tag material: What is a good material for this?

    Hi, I am trying to select a suitable ESD-safe material for using as PCB tags. Is it a good idea to use a bare single strand (22-AWG) wire as a 'tagging-strand' for the PCB?
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    circular waveguide TE11 mode

    Hi, What is the selection criteria behind the length of a circular waveguide, while designing for TE11 mode? Most design handbooks/calculators do not delve deep into the selectivity criterion for length of the circular waveguide. Any rules of thumb would be helpful!
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    Antenna use case: out-of-band usage

    Hi, I would figure out what happens to the performance of an S-Band tuned antenna (let's say a QFH) if I use it in the X-Band frequency. When I saw performance i refer to radiation pattern, axial ratio etc...
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    SMA connectors for DC applications

    Hi, I have an eval board. It requires SMA connectors for DC input (3.3V). Please let me know any reason for supplying DC thru SMA connectors (if fact any coaxial cable interface), especially for low DC voltages. Also, please let me know any precaution while using the same. ( im guessing it...
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    Rt duroid vs Alumina substrate

    Hi, I have an implementation of a psk transmitter system. What is a better choice of substrate for x-band kind of frequencies? Option 1: RT duroid substrates Option 2: Alumina substrates
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    GaN amplifier drain to gate voltage

    Hi, I have a power amplifier datasheet and wanted to understand the following specifications better. Please help! The drain to source voltage (Vds) for the power amplifier is stated to be 30V. However the drain - gate voltage (Vdg_PEAK) is stated to be 80V (DC + RF) in the specifications. What...
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    Convolution Code: Randomizer

    Hi, Does the randomizer of a convolution code depend on the sequence of the input bit stream, in terms of performance guaranteed? I need to know this because I am looking to replicate data, over 2 to n consecutive clock cycles. Please help me!
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    Reflection model and RF propagation

    I want to know the following and wish to debug the scenario below: I have a transceiver at a low height of ~0.5m (named H1). I have another transceiver at a height of 1.5m (named H2). Upon transmitting from the H2 i receive all the data (packets) at H1 in the field. Upon transmitting from H1 i...
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    Convolution code + turbo code

    Hi, I have the following queries: 1) Wanted to know if convolution coding and turbo coding can be implemented in a sequence. 2) What is the effort required to bypass an generic convolution code implementation on an FPGA? My current scenario is that I want to choose during field usage, the data...
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    Ka Band Antenna: HPBW = 20 degrees, gain at HPBW = 60dBi

    Hi, I would like to know (and seek any possible reference) on how to design a Ka Band antenna with gain of 60dBi (at Half power Bandwidth), aperture size < 2meters and half power beamwidth ~ 20 degrees. It would be great to know of any such reference designs. Thanks.
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    Differential Line drivers: Compatibility

    Hi, I was hoping to know if the following part numbers are compatible with each other. (one being the transmitter and the other being the receiver). 1) HS-26CLV31RH (on hardware 1). 2) HS-26CT32RH (on hardware 2 ). Thanks.
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    SEU/SEL Radiation Hardening: Wiebull parameters for Linear energy transfer

    Hi, I would like to know how to apply the Wiebull parameters for Linear Energy Transfer calculations? Also, please share a dummies guide to how this is done?? There are way too many probabilistic methods out there. Thanks
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    Antenna for Space Application

    Hi, I have the following query on antenna design for space application Is it better to have a threaded Feed antenna (for a monopole or a helical antenna) or a soldered feed? The antenna would be exposed to high temperature variations in vacuum environments. So then, would it be better to have...
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    RF measurements: for frequencies greater than 6GHz

    Hi, I am finding that most signal generators are in the range of less than 6GHz measurement. They are pretty cheap also.Similar applies to VNAs, Spectrum analyzers. Is there any way to get a non-conventional solution around how I can use these lower frequency range equipments and yet utilize...
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    Circularly Polarized Patch Antenna: Axial Ratio coming out poor at larger angles

    Hi, I have tried various methods. Can you direct me to a good resource for a AR<3dB for the Patch antenna? Really finding too many dead ends. :/ Regards Guruditya Sinha.
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