Radio frequency module

Abstract

The utility model discloses a radio frequency module, which relates to the technical field of radio frequency, and comprises a receiving channel and a transmitting channel, the receiving channel comprises a B1 receiving cavity filter, a B1 receiving first-stage amplifier, a B1 receiving second-stage filter, a B1 receiving second-stage amplifier and a COM end which are connected in sequence; the transmitting channel comprises an L transmitting first-stage amplifier, a first-stage Fbar, an L transmitting second-stage amplifier, a second-stage Fbar, an L transmitting third-stage amplifier and an L transmitting cavity filter which are connected in sequence. According to the utility model, the Fbar is adopted at the front section of the transmitting link, the cavity filter is adopted at the rear end of the transmitting link, and the cavity filter is adopted at the front end of the receiving link. The transmitting link and the receiving link greatly filter transmitting signals close to the receiving frequency at the same time, the suppression degree can reach 60dB after performance superposition of the two stages of Fbars in the transmitting link and the receiving and transmitting end cavity filter, blocking and burning of a receiving channel by the transmitting signals are avoided, and uninterrupted work of the receiving channel during transmitting is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of radio frequency, in particular to a radio frequency module. Background Art

[0002] The low sideband of the transmitting frequency band of the RF device is very close to the high sideband of the receiving frequency band, and they almost overlap. As a result, a high-power signal is injected into the receiving channel during transmission, causing the receiving channel to be blocked or even burned. Therefore, the receiving channel can only be powered off and closed during transmission to avoid channel blocking and burning. However, this method will cause the problem that the receiving channel cannot be positioned at the moment of transmission, which greatly affects the positioning function of the entire device.

[0003] Therefore, it is necessary to provide a radio frequency module to address the above-mentioned deficiencies in the prior art. Utility Model Content

[0004] The main purpose of the utility model is to provide a radio frequency module, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a radio frequency module, the receiving channel includes a B1 receiving cavity filter, a B1 receiving first-stage amplifier, a B1 receiving second-stage filter, a B1 receiving second-stage amplifier and a COM terminal connected in sequence; the transmitting channel includes an L transmitting first-stage amplifier, a first-stage Fbar, an L transmitting second-stage amplifier, a second-stage Fbar, an L transmitting third-stage amplifier and an L transmitting cavity filter connected in sequence; the COM terminal of the receiving channel is connected to the L transmitting first-stage amplifier of the transmitting channel.

[0006] Further preferably, the B1 receiving cavity filter is a -1.0dB cavity filter; the B1 receiving first-stage amplifier is a +15dB amplifier; the B1 receiving second-stage filter is a -1.5dB filter; the B1 receiving second-stage amplifier is a +20dB amplifier; the L transmitting first-stage amplifier is a +15dB amplifier; the first-stage Fbar is -2dBFbar; the L transmitting second-stage amplifier is a +25dB amplifier; the second-stage Fbar is -2dBFbar; the L transmitting third-stage amplifier is a +18dB amplifier; and the L transmitting cavity filter is a -1.2dB cavity filter.

[0007] Compared with the prior art, the utility model has the following beneficial effects:

[0008] The utility model adopts Fbar in the front section of the transmission link, adopts a cavity filter in the back section of the transmission link, and adopts a cavity filter in the front section of the receiving link. The transmission link and the receiving link simultaneously filter the transmission signal close to the receiving frequency to a large extent. The suppression degree can reach 60dB after the superposition of the performance of the two-stage Fbar and the cavity filter at the transmitting and receiving end in the transmission link, which avoids the blocking and burning of the receiving channel by the transmission signal, and also ensures the uninterrupted operation of the receiving channel during transmission. At the same time, the electromagnetic compatibility of the whole machine is greatly improved, the noise coefficient is low, and the receiving sensitivity of the whole machine is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a structural block diagram of the utility model. DETAILED DESCRIPTION

[0010] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but is not intended to limit the present invention. Any technical solution based on the transformation or inference of the present invention falls within the protection scope of the present invention.

[0011] like Figure 1 As shown, an embodiment of the utility model provides a radio frequency module, wherein a receiving channel includes a B1 receiving cavity filter, a B1 receiving first-stage amplifier, a B1 receiving second-stage filter, a B1 receiving second-stage amplifier and a COM terminal connected in sequence; a transmitting channel includes an L transmitting first-stage amplifier, a first-stage Fbar, an L transmitting second-stage amplifier, a second-stage Fbar, an L transmitting third-stage amplifier and an L transmitting cavity filter connected in sequence; the COM terminal of the receiving channel is connected to the L transmitting first-stage amplifier of the transmitting channel.

[0012] The B1 receiving cavity filter is a -1.0dB cavity filter; the B1 receiving first-stage amplifier is a +15dB amplifier; the B1 receiving second-stage filter is a -1.5dB filter; the B1 receiving second-stage amplifier is a +20dB amplifier; the L transmitting first-stage amplifier is a +15dB amplifier; the first-stage Fbar is -2dBFbar; the L transmitting second-stage amplifier is a +25dB amplifier; the second-stage Fbar is -2dBFbar; the L transmitting third-stage amplifier is a +18dB amplifier; the L transmitting cavity filter is a -1.2dB cavity filter.

[0013] The utility model adopts Fbar in the front section of the transmission link, adopts a cavity filter in the back section of the transmission link, and adopts a cavity filter in the front section of the receiving link. The transmission link and the receiving link simultaneously filter the transmission signal close to the receiving frequency to a large extent. The suppression degree can reach 60dB after the superposition of the performance of the two-stage Fbar and the cavity filter at the transmitting and receiving end in the transmission link, which avoids the blocking and burning of the receiving channel by the transmission signal, and also ensures the uninterrupted operation of the receiving channel during transmission. At the same time, the electromagnetic compatibility of the whole machine is greatly improved, the noise coefficient is low, and the receiving sensitivity of the whole machine is high.

[0014] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A radio frequency module, comprising a receiving channel and a transmitting channel, characterized in that: The receiving channel includes a B1 receiving cavity filter, a B1 receiving first stage amplifier, a B1 receiving second stage filter, a B1 receiving second stage amplifier and a COM terminal connected in sequence; The transmitting channel includes an L transmitting first stage amplifier, a first stage Fbar, an L transmitting second stage amplifier, a second stage Fbar, an L transmitting third stage amplifier and an L transmitting cavity filter which are connected in sequence; The COM terminal of the receiving channel is connected to the L transmitting first stage amplifier of the transmitting channel.

2. A radio frequency module according to claim 1, characterized in that: The B1 receiving cavity filter is a -1.0dB cavity filter; the B1 receiving first-stage amplifier is a +15dB amplifier; the B1 receiving second-stage filter is a -1.5dB filter; the B1 receiving second-stage amplifier is a +20dB amplifier; the L transmitting first-stage amplifier is a +15dB amplifier; the first-stage Fbar is -2dBFbar; the L transmitting second-stage amplifier is a +25dB amplifier; the second-stage Fbar is -2dBFbar; the L transmitting third-stage amplifier is a +18dB amplifier; and the L transmitting cavity filter is a -1.2dB cavity filter.

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