Questions tagged [microstrip]
A microstrip is a transmission line fabricated on a printed circuit board (PCB). They are much less expensive than a traditional waveguide although they typically have higher losses and less power handling capacity.
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Controlled impedance microstrip poor return loss
I have designed a microstrip PCB to confirm that my calculations are correct and roughly measure the signal loss of a 45 mm microstrip. However, the return loss (S11) seems to be very high (~-11 dB) ...
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ill effects of this impedance transformation line; VSWR
A 𝜆/4 long wave guide of Z0 is a narrow band impedance transformer from Zs to Zl where Z02 = Zs*Zl. The power transfer should be maximum from source to load, but does this imply lots of lost power ...
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Retuning Pi Filter & Antenna Matching for nRF52 BLE
I’m facing issues with my nRF52 BLE design due to a solder mask thickness change and grounding approach. I’d appreciate expert guidance on retuning the Pi filter, recalculating impedance, and ...
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High frequency PCB Design for Low Noise Amplifier
I am planning to design a PCB for an LNA operating at higher frequencies, and I have selected the LNA IC (MAAL-011181)
for this purpose.
LNA IC Datasheet
Initially, I assumed that I only needed to ...
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Can I use the same equation for microstrip when ground plane is replace with VCC plane?
In 4 layer stack-up PCB, the bottom side is usually the signal which has VCC/Power plane instead of ground.
In typical setup, we use ground plane in most illustration. And the equation goes like below....
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Kuroda's Identities for Impedance Scaling
I am working on my understanding of RF filters and am in the process of designing a low-pass filter with a 3dB point of 1800 MHz and 10 dB of insertion loss at 2200 MHz. Based on these made-up ...
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Dispersion of a single tone signal on a microstrip transmission line
My question revolves around dispersive behavior on Microstrip lines.
I understand that on a microstrip high frequency signals will travel slower than lower frequencies. This is because the Eeff ...
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Microstrip PCB Design
I am designing a microstrip PCB with frequencies ranging from 100MHz to 8GHz.
There are no significant issues at lower frequencies, but the signal loss becomes quite high as approaching 8GHz.
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Impedance of different track widths - Should I compute the average width?
Assume that you having one track that goes from 0.11mm in width to 0.09mm in width.
I want to compute the impedance, but I need to select the width. What option should I select?
The largest width of ...
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Capacitance on op-amp input (inverting pin)
I have the following configuration for my amplifier, which is an transimpedance amplifier:
I need to connect my transducer to the inverting pin of my amplifier by using a dip switch to be able to ...
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How does a planar balun work (ie, microstrip <-> stripline)?
This document shows a planar microstrip/stripline balun to convert the balanced feed line input to feed the (unbalanced) dipole on a microstrip Yagi antenna.
Question: How does coupling to a tapered ...
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Coplanar waveguide with GND Vs. microstrip general rules
I have been fiddling around with GPS antenna trace impedance matching. I have only Saturn PCB SW to make some calculations.
I can't quite get it when microstrip starts to behave more like a coplanar ...
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Interdigital filter ground connection on PCB
I have used an online designer utility for my 5 GHz to 6 GHz RF output filter, on the schematic it generated it had shown ground attach points, but I am not sure if I designed ground connections and ...
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How specify rectangle size in Sonnet lite
Although not directly an electronics question, there is probably someone who can help me out.
I just started to use Sonnet lite to simulate a microstrip filter. There is one aspect, which to me seems ...
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Unexpected low characteristic impedance using the JLCPCB impedance calculator
I'm currently designing a PCB that is intended to fan out the 38 pins of a MICTOR connector to every other conductor of an 80-conductor ribbon cable (The PATA type one, that is AWG30 wires with a 0....
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