Questions tagged [pcb-antenna]

An antenna which is implemented on a PCB (printed circuit board) by copper traces.

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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-...
Atrahasis's user avatar
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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....
Kaustubh Murudkar's user avatar
1 vote
4 answers
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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 ...
DELTA12's user avatar
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2 answers
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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 ...
Nguyễn Tiến Sang's user avatar
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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 ...
Juno's user avatar
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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 ...
Ahmet Enes YILDIRIM's user avatar
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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 ...
Amrit Aryal's user avatar
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1 answer
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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 ...
Ahmet Enes YILDIRIM's user avatar
2 votes
1 answer
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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 ...
KJ7LNW's user avatar
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2 votes
2 answers
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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 ...
MoCuishle's user avatar
1 vote
1 answer
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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% ...
Afonso Ferreira's user avatar
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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 ...
JoeyB's user avatar
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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 ...
Tomas Gonzalez's user avatar
2 votes
2 answers
922 views

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 ...
AndreaF's user avatar
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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 ...
JayP's user avatar
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1 answer
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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 ...
Fabio Luzo Alves's user avatar
2 votes
0 answers
71 views

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 (...
Vilius Žalėnas's user avatar
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1 answer
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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 ...
Bouboubi's user avatar
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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 ...
Unicorn's user avatar
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SX1261/2 transceiver design: Antenna pins and balun

I am designing my first transceiver (first PCB/IC that uses an antenna). I chose SX1261/2 because it is cheap and supports LoRa protocol. While designing the PCB and reading the datasheet of the IC I ...
Christianidis Vasilis's user avatar
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How to create RF source in CST Studio

I have designed a microstrip patch antenna in CST studio and I want to test its efficiency for energy harvesting. Having followed some youtube videos, I understand creating a waveguide port across the ...
KimchiKiller's user avatar
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249 views

How do I implement lumped circuit elements in ANSYS HFSS v15.0?

I am simulating a PCB antenna using ANSYS HFSS v15.0. Before the signal is fed into the antenna, there is a smoothing capacitor and an LC T-section matching network to match the impedance of the 50 Ω ...
aditya_stack's user avatar
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1 answer
269 views

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 ...
Sal's user avatar
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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 ...
Gabe S.'s user avatar
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2 votes
1 answer
149 views

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-...
Pascal R.'s user avatar
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1 answer
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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-...
ellmkay's user avatar
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1 answer
247 views

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 ...
mehmet's user avatar
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1 answer
130 views

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 ...
harmonica's user avatar
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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 ...
FrankGu's user avatar
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1 answer
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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 ...
P. Egli's user avatar
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3 votes
2 answers
243 views

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 ...
Just doin Gods work's user avatar
1 vote
1 answer
136 views

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
Just doin Gods work's user avatar
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0 answers
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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?
Arun Kumar Thawait's user avatar
0 votes
1 answer
282 views

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 ...
MS-Hossen's user avatar
2 votes
1 answer
253 views

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 ...
Dipanshu's user avatar
3 votes
2 answers
233 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 ...
user3425949's user avatar
1 vote
1 answer
140 views

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 ...
Boris's user avatar
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1 vote
2 answers
209 views

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 ...
Jess's user avatar
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1 vote
0 answers
193 views

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 ...
polemon's user avatar
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1 vote
0 answers
63 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 ...
DidiNano's user avatar
2 votes
2 answers
623 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 ...
DidiNano's user avatar
1 vote
1 answer
1k views

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 ...
FrankGu's user avatar
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1 vote
1 answer
468 views

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 ...
Aminadav Glickshtein's user avatar
0 votes
0 answers
53 views

What is the frequency measurement range of a NanoVNA?

I have tried to measure a fabricated patch antenna which has theoretically multiband ranging from 1 GHz to 8 GHz, but when I tried to measure it through NanoVNA it barely shows the result from 1 GHz ...
MS-Hossen's user avatar
2 votes
0 answers
111 views

Blocking BLE Chip Antenna from picking up signals in one direction

I am designing a BLE scanner/observer which uses a ceramic antenna. I was wondering if there is any way to design the PCB such that the antenna chip only picks up signals from in front of it instead ...
YudiNZ's user avatar
  • 21
0 votes
1 answer
251 views

Extend range of BLE devices

I would like to extend the range of two BLE devices. The first one is a VR BLE controller with a monopole pcb antenna. The second one is an ESP32 Tinypico with a chip antenna. I bought two pcb ...
AyubowanPro's user avatar
0 votes
3 answers
114 views

Signal Integrity in electronic systems

When I went through EMC testing of some electronic boards, I observed that the frequencies of the EM waves generated by the boards are at the fundamental frequency with multiples of some whole number. ...
Vignesh C's user avatar
  • 321
-2 votes
1 answer
118 views

What is the loss of the test antenna connected to the spectrum analyser?

I am testing the gain and radiation pattern of some PCB antennas and have a Siglent SSA-3032X-R spectrum analyser connected to a Tekbox Biconical TBMA1 measurement antenna. The test set up and antenna ...
MRB's user avatar
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8 votes
2 answers
2k views

Can a screw hole in between PCB antenna reduce efficiency significantly?

I am attaching a photo of what I have done. This hole is not suited there, but how much it is going to affect the performance of the antenna?
dharmikP's user avatar
  • 525
1 vote
1 answer
959 views

Aluminium foil as a ground plane for 900 MHz antenna

I have designed and manufactured an antenna that works around 900 MHz. The design includes a ground plane and metallic enclosure that are not strictly necessary, but do affect the performance of the ...
user24368's user avatar
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