Questions tagged [pcb-antenna]
It is an anntenna type which is implemeted on a PCB (printed circuit board) by copper traces.
241
questions
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0answers
54 views
What is a good way to extend the range of a PCB antenna without redesigning the PCB?
I have a circuit board from a product called the 'Tado Internet Bridge', which I am considering making a modification to.
Background: The Tado Internet Bridge device communicates with non-WiFi ...
8
votes
2answers
1k 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?
2
votes
1answer
143 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 ...
2
votes
1answer
144 views
Do I need to solder for activating PCB antenna on this ESP32
I designed and ordered a PCB with ESP32. I want to use the PCB antenna, but this has two options (1. PCB antenna 2. Connector for antenna). I am not sure if I need to solder something to activate the ...
0
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0answers
66 views
What is this antenna and what is its radiation pattern
Sometimes, there are interesting antennas in the market.
As often, the seller knows few things or nothing about it.
This is what they say about it:
Feature:
Antenna frequency 740-6000MHz, good ...
2
votes
1answer
108 views
RF PCBs on 2 layer FR4
I deigning a PCB for an open-source RadioSonde with 403Mhz transmissions using Si4063 ic. Now, these radiosondes are supposed to be inexpensive since there is quite tough competition in the market ...
0
votes
1answer
44 views
Using PCB and external antenna at same time for WiFi
If you use a design with an ESP8266 is there a possibility to use an external antenna (u.fl connector) with a PCB antenna at the same time without using a solder bridge or jumper?
Generally speaking, ...
0
votes
2answers
59 views
Symmetric PCB stack-up for phased-array antennas
We all know that a symmetric PCB stack-up is always recommended since it makes manufacturing easier and more reliable. However when designing PCB for antennas application this became quite a difficult ...
0
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0answers
24 views
PCB antenna: ground plane layers and dimensions (2)?
This question - sequel of PCB antenna: ground plane layers and dimensions?, talking about an IFA:
The only dimension that really matters is the length/width of the
ground plane, or parallel to the ...
0
votes
0answers
33 views
RF line: routing it orthogonal over SPI digital signal lines
SPI will be kept below 1MHz. RF signal is under 434 MHz. Is this crossing fine through the big zero ohm resistor ?
Side question: will the outermost SPI line (it is the chip select one), or any of the ...
1
vote
1answer
104 views
Near end crosstalk saturation in a microstrip transmission line
I am referring to a microstrip PCB transmission line. I simulated the crosstalk situation using Hyperlynx.
Please see the below circuit:
I kept increasing the trace length and measured the crosstalk ...
0
votes
0answers
73 views
B-field strength inside current loop antenna
I want to comprehend the design of a microwave antenna designed by Sasaki et al. (arXiv:1605.04627 [cond-mat.mes-hall])
As can be seen in Fig 2a the magnitude of B is strongest in the center of the ...
0
votes
1answer
82 views
Correct antenna position ESP32 on custom board
Is the antenna position correct in this design? In the ESP32 hardware design document, they say:
The board hasn't copper or tracks under the antenna. I can't put the antenna on the edge because I ...
1
vote
1answer
84 views
Calculate inductance and capacitance of a double layer antenna (RFID)
I want to design an antenna that will work with RFID NFC chip NHS3152.
The NHS3152 IC specs are:
IC capacitance at precise measurement conditions
For this particular IC, there is a demoboard.
Since I ...
0
votes
1answer
78 views
2.4GHz extension for RC [closed]
I’m very new to this field.
We just purchased a ride-on car for our toddler. Everything works well but the distance between remote and car is limited to approx 30 ft, which we were hoping to extend.
...
1
vote
0answers
38 views
2.4GHz BLE and 900MHz LoRa coexistence
I am working on a new design for a simple BLE to LoRa bridge. I have a chip antenna for LoRa that covers 868-915MHz and I was following the Nordic reference design for the 2.4GHz BLE antenna. What ...
1
vote
2answers
117 views
What part on this gate opener PCB is used for communication with the gate's antenna?
I am working on a project where I want to integrate my gate opener into a 5V car input device, to where when I get close to the gate it opens automatically without me needing to press a button.
I have ...
0
votes
2answers
136 views
On which layers of 4 should the trace antenna be (433MHz)?
I have designed a simple PCB with the follow layers
Top Layer, high speed traces (rest ground copper)
Inner 1, Ground Copper area everywhere apart on the very left side where the trace antenna will ...
0
votes
1answer
74 views
2.4/5.8 GHz Microstrip Antenna Design
SE,
I am trying to replicate the F-shape microstrip antenna design shown in:
https://www.researchgate.net/publication/330747527_Dual-Band_Monopole_Antenna_for_RFID_Applications
in Keysight's ADS,
I ...
1
vote
1answer
121 views
How to separate PCB antenna and SMA connector?
I am designing a prototype PCB for a Lora node.
It will have an SMA connector (J2) and a PCB antenna.
Switching RF connectors are not available in my area, so as an amateur enthusiast what is a good ...
0
votes
1answer
131 views
PCB antenna connector and copper signal names
I am trying to build a PCB antenna similar to what is shown in this video. At the 6:24 mark it shows the circuit layout below:
I am using Eagle to layout the PCB on a two layer board. ...
1
vote
4answers
351 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 ...
1
vote
2answers
70 views
Distance an inverted F antenna should be from the bottom and side edges of a PCB?
Distance from the bottom is usually either in the center of the PCB or close to the bottom edge with the length arm always pointing toward the farthest edge from the antenna position.
CENTER?
OR EDGE?...
1
vote
0answers
47 views
Is it beneficial to use a taper for the feed input of a PCB antenna?
What is your opinion on using a taper for the feed input of a PCB antenna? Say the feed is 2mm wide and the transmission line is 0.45 mm. Would a taper just cause more impedance mismatch? Or would it ...
0
votes
0answers
36 views
Electric Field of Patch Antenna
I am working on developing Patch antenna for 5G Applications. As the first step, I am trying to understand the working and properties of Microstrip patch antenna.
All the resources I have read state ...
0
votes
1answer
65 views
Unsure about designing an ultra wide band antenna
So, a bit of background, I have designed and measured some antennas in college so I have a decent theoretical grasp of the subject, but they were optimized for a narrow band usage and certain ...
1
vote
1answer
222 views
I would like to know what this circuit is
I'm a engineer of embedded systems and I'm studying a 4G modem. The circuit has a component that I want to identify but the reference is apparently wrong. The reference printed in the circuit is ...
0
votes
1answer
55 views
Printed dipole vs ordinary (3D) dipole
In order to make a comparison between an ordinary (3D) half - wavelength dipole and its printed (planar version), I've done a simulation in both cases. Both were designed to work at 3GHz (100mm ...
0
votes
1answer
127 views
Circuit only works while touching the ground
so I am doing a small ESP8266 relay module. The relay is used as a SPDT switch so you can turn on the light with a normal switch on the wall but the module can shut them off after no motion is ...
0
votes
0answers
20 views
How to determine patch antenna slit/truncation size for RHCP?
I am designing a patch antenna for a project. It is running at 2.45GHz. I am looking into both rectangular and triangular designs. I need to have a single coaxial feed point. I found all the formulas ...
0
votes
0answers
104 views
Bluetooth antenna problem with SIM800C on my board
I have designed a board with a SIM800C and I have followed all details with its given datasheet. Everything is working well except the Bluetooth that gives very low antenna strength (less than 10cm.)
...
0
votes
2answers
270 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 ...
2
votes
0answers
43 views
Capacitive Touch Pad Design with TTP224 ic
I am designing circular capacitive touch pads of Dia:20mm driving from TTP224 IC on my PCB. There will be 2mm glass panel above Touch pads. My PCB contains other circuits like Arduino, Antenna bands ...
0
votes
1answer
209 views
How to repurpose an old PCB?
I am brand new to electronics and would like to know if there's any way to reprogram the microcontroller or reuse a used PCB. I extracted this PCB from my old Bluetooth speakers. Here's the image:
...
0
votes
0answers
113 views
PCB manufacturing - Why etch resist such as Tin is removed after the etchant has removed the unwanted copper
Alright so I'm learning the PCB manufacturing process.
I have seen many professional PCB manufactures use "Tin" to be used as an "etch resist" which protects the copper traces ...
0
votes
1answer
59 views
How to decide on laying out copper area when working with Wifi/RF chips & how to use a guard ring?
I have seen on several designs that the designer has avoided pouring copper around the RF signal lines and all signal lines in general. Such as seen on the following example. He has also added a "...
0
votes
0answers
101 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 ...
1
vote
2answers
143 views
nRF24 PCB Antenna Choices
I am trying to create RF module using the nRF24L01P. I am trying to maximize the range while still using a trace antenna. My plan is to combine the simple trace antenna design with the long range ...
0
votes
0answers
80 views
Near-field microwave antenna design
How to I design an antenna which produces a strong field within the antenna, but doesn't radiate out or reflect back to the source? (as much as possible)
I'd like ideally to have a planar structure (...
0
votes
1answer
103 views
Circuit for selecting between PCB antenna and external
I'm just developing the second iteration of an 2.4Ghz sensor and receiver set. Because I can't afford the expensive development path of a big commercial project and because the environment these ...
1
vote
1answer
57 views
1/4 WL Strip Antenna Questions
I'm designing a module around the nRF52832 SOC and I need some help regarding the single-ended microstrip antenna. I have three questions, so please bear with me.
The first question is about how wide ...
0
votes
1answer
270 views
How do I add an external Bluetooth antenna to this circuit?
I want to disconnect the PCB Bluetooth antenna and add a U.FL SMD for an external antenna.
Can someone please advise me what to cut/add/solder?
0
votes
1answer
48 views
Calculating link budget
I was reading and found that there are different ways to calculate "link budget" and I want to know which one is correct because they are confusing to me.
For example, some sources state ...
0
votes
2answers
139 views
Antenna Tuning for Source Impedance not equal to 50 Ohm
I have designed a setup for 433.92MHz wireless device (a key fob). The source impedance is not equal to 50Ohm. The load impedance may or may not be 50Ohm depending upon the choice of the antenna. For ...
0
votes
1answer
674 views
BLE beacon 2.4GHz PCB antenna layout for SoC Nordic nRF52832
Schematic, suggested by the datasheet:
PCB is round with 33mm, FR4 1.6mm
Bottom side
Top side
Bottom+top
3d view
The antenna drawings is based on AN043 of Texas, HERE.
How about the question on ...
1
vote
1answer
166 views
Would a ground plane/traces impact NFC antenna performance?
I am building a PCB business card with an NFC chip and a WS2812B LED display (powered by a USB-C port, NFC is not connected to the LEDs). Right now I have a ground plane on the side of the antenna (...
2
votes
2answers
102 views
GND plane and reference potential
I have seen that most of RF printed board circuits have a GND plane which is connected to the power supply ground terminal and serves as a return path for current from different components on the ...
0
votes
1answer
141 views
434MHz Small loop printed antenna design
For antenna design, usually it is half wavelength or quarter wavelength antenna. I am trying to understand small loop printed antenna design for 434MHz frequency where even the quarter wavelength is ...
11
votes
1answer
2k views
What are these uniform traces that extend to the board edge?
These Super Famicom cartridge PCBs have what appear to be uniformly-spaced traces extending all the way to the extreme left and top of the board. They don't look castellated (and there are easier ...
0
votes
1answer
85 views
90 degrees rotated MIFA 2.4GHz Antenna reference design?
NXP offers a reference design of a MIFA antenna for the 2.4 GHz BT LE frequencies. On page 4 of the PDF the design is shown:
For my application this reference design is too wide; does anyone know of ...
