Questions tagged [pcb-antenna]
An antenna which is implemented on a PCB (printed circuit board) by copper traces.
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Trace between RFM95 module and U.FL connector
I want to connect a SMD U.FL connector with RFM95.How can I calculate the trace width of the signal and ground lines between the RFM95 and the U.FL connector.?
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Guidelines for signal routing near an RFID module array
The task at hand is connecting multiple RFID (13.56 Mhz) antennas in an array.
Each antenna works on its own and access to it is by SPI. Only one antenna is active at a given moment.
The technicals:
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Unable to replicate Twisted IFA antenna S-parameter curve using ANSYS HFSS 15
I am attempting to replicate the S-parameter curve for an antenna design as described in the paper "Antenna Design and Analysis" with DOI: 10.1109/LAWP.2009.2015345 using ANSYS HFSS 15.
Here ...
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Are these antennas interchangeable?
The small rectangular antenna in the left hand side of the case came with the device (Lilygo-T-RelayS3).
The larger one outside the case came from a different device (Old Particle Photon).
I was ...
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Adding SMA connector to a 433 MHz remote
I need to open a gate from 100 meters distance. This gate uses a 433 MHz rolling code remote.
The only option I see, is to connect an active amplifier to the remote using a SMA connector. Those ...
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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.
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RFID antenna measuring resonance frequency does not cover the theoretical value
I am looking to design a custom RFID antenna which operates at 13.56 MHz. I have designed the antenna using the NFC Design tool (link). Please see the parameters below:
Figure 1: Antenna parameters
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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'...
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What is the specific name of PCB coil using for LNB power supply?
I am working as an hw design engineer and create a schematic for DVB-S/S2 system. I am using a power supply IC for to supply LNB. To distinguish DVB-S signal from DC voltage, PCB coil is used . I know ...
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Reflection on PCB + antenna
I have a transducer with 64 outputs. I want to have 3 of the outputs on my amplifier input in a way that I can choose between them. My first idea for implementing this was to use jumpers as follows:
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How to calculate distances between stitching vias for RF lines?
I have a query concerning the stitching of vias for RF lines and board fencing. According to the application note, it is recommended that the distance between vias should fall within the range of one-...
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How to improve wifi reception on LR1110 Chip?
I am building a custom PCB with the LR1110 LoRa chip, which uses a WiFi chip antenna for obtaining MAC address of the wifi networks. For the WiFi Chip antenna, I am using a W3006 Ceramic Chip Antenna....
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Determine dielectric constant of unknown FR4 substrate
I have a piece of single sided FR4 PCB substrate that I need to build a 2.4 GHz patch antenna on using copper tape.
Other than the dimensions and it being FR4 I know nothing about the substrate.
Is ...
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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 ...
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Max operating temperature for PCB/Chip antennas
I'm looking for an antenna (PCB or chip), which I'd like to install in an environment that can exceed 110°C.
Here are my questions :
Should I trust the temperature ranges given for antennas? The ...
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Increasing of Bow Tie Antenna Bandwidth
I designed different types of bowtie antenna in CST. But this type of antenna results s11 is not good. I want to increase of antenna bandwidth. I'm trying to get better bandwidth by changing antenna ...
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NFC Antenna Design for ST25R3911B in HFSS: Seeking Assistance with Antenna Parameters Extraction
I am currently working on antenna matching for an ST25R3911B NFC reader IC and using HFSS for simulation purposes. STMicroelectronics provides an antenna matching tool, and I am planning to use a ...
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BowTie Antenna Design in CST
I try to design bowtie antenna in CST simulation. This design include that substrate FR4 not with ground and top side is antenna(copper). This design's measurement is calculated online sites. Problem ...
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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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Altium Designer Net Antennae Error
I am connecting a via to a polygon in one of the middle layers. My goal is to use it as a test point. Altium gives me a net Antennae violation. Although there are ways to silent the tool from giving ...
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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% ...
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How does spacing of GND via work for shielding?
I noticed the YouTuber using GND vias around the PCB antenna. I know this is used to avoid any currents from nearby components coupling to the antenna.
However, he also mentions something about the ...
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Connect a U.FL connector to a printed PCB antenna
I want to connect a U.FL connector to a PCB antenna on the ATWINC15x0-MR210PB, which is a meandered inverted F Antenna (IFA). I am not sure where to begin termination. C21 is where the antenna signal ...
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Proper way to combine same-frequency PCB antennas
I want to combine 2 identical PCB antennas to increase gain. The antennas are designed to work on 2.4GHz and have 50ohm impedance, linear polarization with Omni-Directional radiation pattern, they are ...
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Smartphone Bluetooth Antenna Modification
Is it possible to modify smartphone Bluetooth antenna (2.4 GHz) by redesigning it? I am currently designing a Polyimide microstrip patch antenna with 50 ohms impedance. What steps should I make so ...
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Helical antenna on PCB connected on ground?
I purchased the wireless bell that works on 433 MHz and would like to have an antenna with more gain in order to receive the signal a little bit far.
When I opened the device I found the helical ...
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Information sources to design a spiral PCB antenna
I am starting a huge experimental project and I want/need to explore the frequency independent antennas. I settled on two very interesting antenna topologies that are possible to design as a PCB (...
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Design of an antenna on a PCB card emitting between 1000 and 5000 Hz
I would like to create an antena on my PCB thanks to copper track. My antenna has to be a square like a coiled coil in order to emitt a magnetic field.
Is it possible to create an antenna like that ...
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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 ...
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Replace internal antenna with external antenna
I'm trying to figure out whether it's worth trying to replace an internal antenna for an external antenna of a uhf transmitter/receiver to get a stronger signal in order to get more distance from them ...
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What does the value of R_t represent in Balanis' bowtie antenna design equations?
I'm using Antenna Theory: Analysis and Design by Constantine Balanis to aid in the design of a wideband antenna. I believe a bowtie antenna will satisfy my necessary bandwidth, however Balanis notes ...
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How to implement a 2-layer PCB antenna on a 4 or 6 layer stack-up?
I am new to antenna designs. Lots of design guides mentions that no ground is required on the second layer (antenna on the TOP layer, IFA or MIFA for example.)
I'm wondering to how to implement a 2-...
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Antenna network design, 868 MHz Rainsun antenna
I want to add LoRa support to a PCB design of mine, and because I'm fabricating at JLCPCB, I am considering the following components (since they are well stocked):
DL-RFM95-868M LoRa module
AN1603-...
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Why does this RF PCB have small holes in the ground polygon?
I usually pay attention to RF PCBs.
This shape is like a hole, but it is not, the ground surface is used in the form.
What is the purpose of making these holes?
How can I make them easily with the ...
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RFID Antenna Simulation using MATLAB
I have designed a PCB with RFID antenna and I want to simulate this antenna. I know I need to use PCB Antenna Design APP in MATLAB for this. My MATLAB version is 2017b, this version only has Antenna ...
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Question about how a Bluetooth signal propagates out of the antenna of a BBC Microbit?
I want to know how a Bluetooth signal propagates to which designated direction in these two pictures with the strongest output from the trace antenna.
Is there any HFSS analysis image similar to this ...
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Generating strong UHF magnetic fields on a PCB
I would like to generate a strong magnetic rf field in the order of 1 mT using a PCB structure in a frequency range from 200 MHz to 1 GHz over a region of 5 mm diameter. What could I do to produce ...
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Help me improve my PCB design
I have made this PCB design with the help of a reference circuit to run an e-paper display with an nRF52810.
I have doubts about the followings:
Do signal track lengths or widths need to change?
Is ...
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Meaning of these cuts on an antenna
What's the purpose of these cuts at the end of the antenna?
It is some kind of representation of an RF antenna.
Here is the Eagle library
Edited:
Here Git Source Original File
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How to decide RFID tag antenna inductance?
I know how to calculate the antenna inductance of a given RFID tag antenna but how do I decide what value of antenna inductance is needed for the design?
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How to add prepreg material 7628 (fiberglass impregnated with resin) in CST microwave studio for multilayer antenna simulation?
I'm designing an antenna structure that will be embedded with a 4-layer radio circuit. The difficulty I'm facing to simulate the structure is not getting the prepreg 7628 material (fiberglass ...
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Using SWRA117D 2.4 GHz antenna on a large board
I've added the board image. There is one ESP32-C3 on a 2 layer FR-4 board. My question is, how much I'm compromising with the efficiency of the antenna by placing it on a ~52X85mm board considering ...
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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 ...
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How do PCB trace antennas with pigtail sockets work?
I am trying to understand the general way how wireless devices (cell modem, wifi card, router, other) work that have a socket for an optional external antenna. The main goal is to increase signal ...
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Is a copper plane a good antenna?
It is said that the size of a 1/4-wave antenna is approximately one-quarter of the wavelength of the desired frequency. I saw also somewhere that it can also be longer than 1/4 and it will also ...
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What kind of RF-splitter does the Raspberry Pi Compute Module 4 use, and what type is the PCB-Antenna below?
There's a version of the Compute Module 4 available, with on-board WLAN.
The RF-out min of the RF module goes through what seems to be a splitter, and then into both a U.FL- (UMCC)-type connector, but ...
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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 ...
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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 ...
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Can I solder a wire antenna to the exposed PCB antenna of a BBC Micro Bit to boost its bluetooth signal?
Can I solder a wire antenna to the exposed PCB antenna of a BBC Micro Bit to boost its Bluetooth signal for both transmitting and receiving data?
Can I solder this type of 2.4G antenna to boost the ...
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How to fix the keyless key (replace the antenna) of Mistubishi Outlander?
Background story:
I had a keyless keyfob for my Outlander, and lost it.
I went to the service and they configured a new key for me.
The serviceman told me that many times when the key falls the ...
