All Questions
Tagged with impedance-matching pcb-antenna
23
questions
0
votes
1
answer
32
views
Correct connection of a Wi-Fi board having both printed antennas and U.FL sockets
An RF part of a dual antenna Wi-Fi module from Aliexpress.
We can see coax sockets connected in parallel to printed antennas. Two external antennas and corresponding pigtails are part of the package.
...
- 13
0
votes
2
answers
78
views
Difference between characteristic impedance vs complex impedance
Are there any differences between complex impedance of antenna pcb trace vs characteristic impedance of antenna pcb trace.
This question rised up because of online pcb trace impedance calculator doesn'...
- 11
0
votes
2
answers
172
views
Why don't people always use 50 ohm resistors when matching impedances?
Impedance matching when designing the RF receiver circuit and antenna design takes a lot of time and effort for VNA. People often use capacitors and inductors to match the impedance of the antenna ...
1
vote
1
answer
101
views
What parts of the trace count for the feedline impedance in antenna design?
I'm trying to incorporate a ceramic chip antenna in a wearable device due to its low footprint and affordability. After reading the datasheet countless times and YouTube tutorials I'm still not 100% ...
0
votes
0
answers
97
views
Matching Networks for 915Mhz
I'm trying to build a PCB antenna for Lora 915Mhz.
I saw this Inverted-F Antenna (page 15) and this one (page 31), but often the matching network used are not indicated.
I was thinking it's just a ...
- 193
3
votes
2
answers
284
views
RF impedance matching other than 50 Ω
I am working on an VHF down-converter using the SA602. The RF input impedance to this chip is 1.5 kΩ. I understand that hooking up to most antennas will require a 50 Ω matching network. However, for ...
- 176
1
vote
0
answers
65
views
At which point do we take the value of impedance to tune an antenna?
I am a beginner in antenna design and tuning.
I want my antenna to have a resonant frequency of 2.45GHz for low-energy Bluetooth communication, and I want to know what to consider for the matching ...
- 31
2
votes
2
answers
687
views
Antenna pi-network matching High or low pass?
I am a beginner in RF system design and I have some questions.
I have a PCB trace antenna, I need to tune it to 2.45GHz, this is for Bluetooth low energy communication.
I want to use a pi-network for ...
- 31
1
vote
4
answers
2k
views
Where should I place my RF test point?
So I am starting to make my first RF circuit board. We will be using a PSoC4 BLE chip as the transceiver. I'm doing my best to follow their application notes, specifically this one.
I should add an ...
- 428
0
votes
2
answers
1k
views
How to calculate impedance of a PCB trace Antenna in Altium w.r.t. a given frequency?
I am keeping things abstract as I intend to learn and not just copy another design.
So, suppose I am trying to design an antenna of impedance Z and frequency f.
Now, in Altium 18, there is a feature ...
0
votes
0
answers
263
views
Single trace width calculator for impedance matching
I would like to calculate the trace width of a dipole PCB antenna in order to match a 50ohm impedance.
Obviously, there is no ground on the bottom side.
All the impedance matching trace width ...
- 671
0
votes
1
answer
232
views
Impedance Matching of an Antenna
I am reading about antenna design and have a few questions which I could not get clarified.
I read about "Stubs". I got to know that Stubs are used for impedance matching of an Antenna either by ...
user220456
1
vote
1
answer
596
views
PCB Antenna Tuning
I am trying to tune an antenna as seen above, using this wonderful Smith Chart Tool. It needs to match 35 + 10j characteristic impedance.
I have found a tool like the Microstrip Impedance Calculator ...
- 11
0
votes
1
answer
432
views
How to calculate component value of a matching network
You can already expect my knowledge level In antenna designing (newbie). This may be or may not be a stupid question. The reason is I don't know about this very much.
Iam designing a PCB for ESP32 ...
1
vote
3
answers
648
views
Measure impedance of PCB antenna with very small ground plane
I have recently been designing different PCB antennas with very small ground planes due to design restrictions. I use a VNA to measure the impedances, but am having trouble measuring them correctly.
...
- 2,310