Questions tagged [pcb-antenna]

It is an anntenna type which is implemeted on a PCB (printed circuit board) by copper traces.

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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 ...
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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, ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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. ...
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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 ...
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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?...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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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.) ...
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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 ...
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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 ...
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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: ...
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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 ...
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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 "...
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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 ...
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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 ...
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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 (...
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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 ...
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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 ...
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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?
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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 ...
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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 ...
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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 ...
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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 (...
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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 ...
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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 ...
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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 ...
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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 ...

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