JPH0366233A - Transmitter-receiver - Google Patents
Transmitter-receiverInfo
- Publication number
- JPH0366233A JPH0366233A JP20336989A JP20336989A JPH0366233A JP H0366233 A JPH0366233 A JP H0366233A JP 20336989 A JP20336989 A JP 20336989A JP 20336989 A JP20336989 A JP 20336989A JP H0366233 A JPH0366233 A JP H0366233A
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- JP
- Japan
- Prior art keywords
- frequency
- signal
- transmission
- transmitting
- reception
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は通信衛星などを中継して超高周波信号を送信お
よび受信する送受信装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a transmitting/receiving device for transmitting and receiving ultra-high frequency signals via relays such as communication satellites.
従来の技術
第５図は従来の送受信装置の構成例である。 ｌは信号
入力端子であり、この信号出力端子８に人力された送信
ＩＦ倍信号送信周波数変換器２と送信局部発振器３によ
り送信ＲＦ倍信号周波数変換される。４はサーキュレー
久 ５はアンテナである。一方、受信ＲＦ信号はアンテ
ナ５、サーキュレータ４を介して受信周波数変換器６に
入力され受信ＩＦ信号に周波数変換され 信号出力端子
８に出力される。７は受信局部発振器である。BACKGROUND OF THE INVENTION FIG. 5 shows an example of the configuration of a conventional transmitting/receiving device. 1 is a signal input terminal, and the transmission IF multiplied signal inputted to this signal output terminal 8 is subjected to frequency conversion of the transmitted RF multiplied signal by the transmission frequency converter 2 and the transmitting local oscillator 3. 4 is a circular ring and 5 is an antenna. On the other hand, the received RF signal is input to a reception frequency converter 6 via an antenna 5 and a circulator 4, frequency-converted to a reception IF signal, and outputted to a signal output terminal 8. 7 is a receiving local oscillator.
発明が解決しようとする課題
ところ力交 上記構成の送受信装置でζよ 局部発振器
が２個必要である。しか転 特にミリ波帯のように周波
数が非常に高い送受信装置では 送信ＩＦ倍信号送信Ｒ
Ｆ倍信号周波数変換する送信周波数変換器２の局部発振
源負 受信ＲＦ信号を受信ＩＦ信号に周波数変換する受
信周波数変換器６の局部発振源に（ヨミリ波帯の局部発
振器が必要になる力交 このミリ波帯の局部発振器は効
率が低いた２ａミリ波帯の局部発振器が２個（送信局部
発振器３と受信局部発振器７）必要な上記構成の送受信
装置では消費電力が大きくなる。更には位相雑音の少な
いミリ波帯の局部発振器が必要な送受信装置で（よ ミ
リ波帯の局部発振器の構成は複雑で形状も太きいた歇
送受信装置全体としても複雑で形状も大きくなる。本発
明はかかる点に鑑みてなされたもの玄 送受信装置の局
部発振源の中で周波数の高い２個の局部発振源を周波数
の低い同一の局部発振器から構成するようにして、局部
発振源の構成が簡単な送受信装置を提供することを目的
とする。The problem to be solved by the invention is power exchange.The transmitter/receiver with the above configuration requires two local oscillators. However, especially in transmitter/receiver devices with extremely high frequencies such as those in the millimeter wave band, the transmitter IF times the signal transmitter R.
The local oscillation source of the transmitting frequency converter 2 that converts the frequency of the received RF signal into the receiving IF signal is used as the local oscillating source of the receiving frequency converter 6 that converts the frequency of the received RF signal into the received IF signal. This millimeter-wave band local oscillator has low efficiency, so a transmitting/receiving device with the above configuration that requires two 2a millimeter-wave local oscillators (transmitting local oscillator 3 and receiving local oscillator 7) consumes a large amount of power. This is a transmitting/receiving device that requires a local oscillator in the millimeter wave band with low noise.
The transmitting/receiving device as a whole becomes complicated and has a large shape. The present invention has been made in view of the above points. Among the local oscillation sources of a transmitting/receiving device, two local oscillation sources with high frequencies are configured from the same local oscillator with a low frequency. The purpose of the present invention is to provide a simple transmitting/receiving device.
課題を解決するための手段
本発明ζよ 送受信用の送信周波数変換器および受信用
周波数変換器をそれぞれ２重とし ２重の送信および受
信の周波数変換器のそれぞれ一方の局部発振源を同一の
局部発振源で構成し この局部発振源の周波数を送信周
波数と受信周波数の差の周波数の半分に選ぶとともに
前記 ２重の送信および受信の周波数変換器のそれぞれ
他方の局部発振源を同一の局部発振源で構威し 該局部
発振源の周波数を前記送信周波数と前記受信周波数の中
間の周波数になるように設定し 一方の局部発振源と他
方の局部発振源とを同一の局部発振器から構成するよう
にしたものである。Means for Solving the Problems According to the present invention ζ, the transmitting frequency converter for transmitting and receiving and the receiving frequency converter are each duplicated, and the local oscillation sources of one of the duplicated transmitting and receiving frequency converters are connected to the same local oscillation source. It consists of an oscillation source, and the frequency of this local oscillation source is selected to be half the frequency of the difference between the transmitting frequency and the receiving frequency.
The other local oscillation source of each of the dual transmitting and receiving frequency converters is the same local oscillating source, and the frequency of the local oscillating source is set to be an intermediate frequency between the transmitting frequency and the receiving frequency. One local oscillation source and the other local oscillation source are configured from the same local oscillator.
作用
本発明は 上記した構成により、発振器を共用でき、し
かも発振器の周波数が低くできるので発振器の構成が簡
単で実現が安易となり、送受信装置全体としても実現が
安易となる。Effects of the present invention With the above-described configuration, the oscillator can be shared and the frequency of the oscillator can be lowered, so the oscillator configuration is simple and easy to implement, and the transmitting/receiving device as a whole is also easy to implement.
実施例
第１図（友 本発明の送受信装置の第１の実施例を示す
。 １は信号入力端子であり、この信号入力端子ｌに入
力された第１送信ＩＦ信号（周波数Ｆｔｌ）は第１送信
周波数変換器９と局部発振器１０（周波数ＦＬｔ）によ
り第２送信ＩＦ信号（周波数Ｆｖａ）に周波数変換され
る。１１は第２送信周波数変換歌１２は逓倍数−の逓倍
器（出力周波数ＦＬａ）で第２送信周波数変換器１１の
局発源になっており、第２送信ＩＦ信号を送信ＲＦ倍信
号周波数ＦＴ）に周波数変換する。４はサーキュレー久
５はアンテナであり、送信ＲＦ倍信号サーキュレータ
４を通過後、アンテナ５から出力される。一方、受信Ｒ
Ｆ信号（周波数ＦＲ）はアンテナ５、サーキュレータ４
を介して第２受信周波数変換器１３に人力され第２受信
ｔＦ信号（周波数ＦＲ２）に周波数変換される。第２受
信周波数変換器１３の局発源は逓倍器１２の出力信号で
ある。１４は第１受信周波数変換器で第２受信ＩＦ信号
変換器の第２受信ＩＦ信号（周波数ＦＲｌ）に周波数変
換し 信号出力端子８に第１受信■Ｆ信号を出力する。Embodiment FIG. 1 shows a first embodiment of the transmitting/receiving device of the present invention. 1 is a signal input terminal, and the first transmission IF signal (frequency Ftl) input to this signal input terminal l is The frequency is converted into a second transmission IF signal (frequency Fva) by the transmission frequency converter 9 and the local oscillator 10 (frequency FLt). 11 is the second transmission frequency conversion signal 12 is a multiplier with a multiplier (output frequency FLa) It serves as a local oscillator for the second transmission frequency converter 11, and frequency-converts the second transmission IF signal to the transmission RF signal frequency (FT). 4 is a circulator; 5 is an antenna; after passing through the transmission RF signal circulator 4, the signal is output from the antenna 5; On the other hand, receiving R
F signal (frequency FR) is antenna 5, circulator 4
The received tF signal is inputted to the second reception frequency converter 13 via the tF signal and frequency-converted into a second reception tF signal (frequency FR2). The local oscillation source of the second reception frequency converter 13 is the output signal of the multiplier 12. 14 is a first receiving frequency converter which converts the frequency into the second receiving IF signal (frequency FRl) of the second receiving IF signal converter and outputs the first receiving IF signal to the signal output terminal 8.
第１受信周波数変換器１４の局発源は局部発振器ｌＯの
信号である。そして、例えば衛星通信では送受信装置か
ら送信された送信ＲＦ倍信号周波数ＦＴの電波として通
信衛星で受信され 送信ＲＦ倍信号周波数ＦＴと異なる
周波数ＦＲの信号に周波数変換されて再び通信衛星から
送受信装置に向けて周波数ＦＲの電波として送信され
その送信された信号を送受信装置で受信ＲＦ信号として
受信するものである。第２図は第１図の送受信装置の主
要周波数成分を示す。ＦＲは受信ＲＦ信号の周波数、Ｆ
ｒは送信ＲＦ倍信号周波数、ＦＬ２は逓倍器１２の出力
周波数、ＦＡＩは第１受信ＩＦ信号の周波数、ＦＴＩは
第１送信ＩＦ信号の周波数、ＦＬＩは局部発振器１０の
周波数、ＦＴＩ２は第２受信ＩＦ信号の周波数、ＦＴ２
は第２送信ＩＦ信号の周波数である。第２図において、
局部発振器ｌＯの周波数ＦＬＩはＦ Ｔ −ＦＲ−２Ｘ
ＦＬＩの関係を満足するように選ばれている。The local oscillator source of the first reception frequency converter 14 is a signal from a local oscillator IO. For example, in satellite communications, the radio waves are received by the communication satellite as radio waves with the transmission RF multiplied signal frequency FT transmitted from the transmitting/receiving device, are frequency-converted into a signal with a frequency FR different from the transmitted RF multiplied signal frequency FT, and then transmitted from the communication satellite to the transmitting/receiving device again. are transmitted as radio waves with frequency FR toward
The transmitted signal is received by the transmitting/receiving device as a received RF signal. FIG. 2 shows the main frequency components of the transmitter/receiver of FIG. 1. FR is the frequency of the received RF signal, F
r is the transmission RF signal frequency, FL2 is the output frequency of the multiplier 12, FAI is the frequency of the first reception IF signal, FTI is the frequency of the first transmission IF signal, FLI is the frequency of the local oscillator 10, and FTI2 is the second reception frequency. IF signal frequency, FT2
is the frequency of the second transmission IF signal. In Figure 2,
The frequency FLI of the local oscillator lO is F T -FR-2X
Selected to satisfy FLI relationships.
逓倍器１２の出力周波数ＦＬ２はＦＬ２＝ ＸＦＬ
Ｉ関係関係間係により第２図（ａ）、 （ｂ）（ｃ）、
（ｄ）の４通りの周波数配列構成が存在する。第２図
（ａ）はＦＴ ＞ ＦＲの＜ ｌｈ （ＦＴ ＜ ＦＲ
の場合）の関係を満足するように選ばれている。更にＦ
ＲＩ、ＦＴＩはＦＲ２やＦＴ２より低くなるようＥ
ＦＬ２は選ばれている。そして、各周波数のの各周波数
の間には次のような関係式が成立している。第２図（ａ
）ではＦｖ＋＋ＦＬ＋＝Ｆｔ２．Ｆｔ２＋ＦＬａ＝Ｆｔ
、ＦＬ２−ＦＲ＝ＦＲ２、ＦＬ Ｉ −ＦＲａ富ＦＲＩ
、ＦＬ２＝ −Ｘ ＦＬＩ （Ｎ、Ｍ正の整数）が成立
し 第２図（ｂ）ではＦＴ ｔ ＋ＦＬ Ｉ ＝ＦＴ
２． ＦＬ２−ＦＴ２＝ＦＴ、ＦＲ−ＦＬ２＝ＰＲ２，
ＦＬＩ−ＦＲＩ！＝ＦＲ１，ＰＬ２ ＝ −Ｘ Ｆ Ｌ
Ｉが成立し 第２図（ｃ）ではＦＬ Ｉ −ＦＴ ｌ
＝Ｆｖａ、ＦＬ２−Ｆｖａ＝Ｆｖ、Ｆｐ−ＦＬａ＝Ｆ
Ｒ２，ＦＲａ−Ｆｔ＋＝ＰＲ＋、ＦＬ２＝ＸＦＬＩが成
立ｌ−第２図（ｄ）ではＦＬ ＋ −Ｆｔ Ｉ −ＦＴ
２、ＦＴＩ−２＋ＦＬｅ＝Ｆｒ、ＦＬ２−Ｆｔ＋豐ＦＲ
２，ＦＲ２〜ＦＬＩ＝ＦＡＩ、ＦＬ２＝信号のスペクト
ラム変換器の第２送信ＩＦ信号のスペクトラムと同じ極
性にすることができ、スペクトラムの反転□が生じるこ
となく、送受信装置の回路を構成することができる。し
か転 送受信装置の局部発振器を従来の２個から１個に
減らすことができる。特に 局部発振器１０の周波数Ｆ
ＬＩと送信ＲＦ倍信号周波数Ｆｖ、受信ＲＦ信号の周波
数ＦＲの関係をＦＴ〜ＦＲ＝２ＸＦＬＩのように選ぶこ
とにより、Ｆｔ＋＋＝Ｆｖ＋の関係が成立し 第１送信
ＩＦ信号と第１受信ＩＦ信号の周波数を等しくできる。The output frequency FL2 of the multiplier 12 is FL2=XFL
Figure 2 (a), (b) (c),
There are four frequency array configurations shown in (d). Figure 2 (a) shows FT > FR < lh (FT < FR
) is selected to satisfy the relationship . Further F
E so that RI and FTI are lower than FR2 and FT2.
FL2 is selected. The following relational expression holds between each frequency. Figure 2 (a
) then Fv++FL+=Ft2. Ft2+FLa=Ft
, FL2-FR=FR2, FL I -FRa wealth FRI
, FL2= -X FLI (N, M positive integer) holds, and in Fig. 2(b), FT t +FL I = FT
2. FL2-FT2=FT, FR-FL2=PR2,
FLI-FRI! =FR1, PL2 = -X F L
I holds true, and in Fig. 2(c), FL I -FT l
=Fva, FL2-Fva=Fv, Fp-FLa=F
R2, FRa-Ft+=PR+, FL2=XFLI holds l- In Figure 2(d), FL + -Ft I -FT
2, FTI-2+FLe=Fr, FL2-Ft+fung FR
2, FR2~FLI=FAI, FL2=signal spectrum can be set to the same polarity as the spectrum of the second transmission IF signal of the converter, and the circuit of the transmitting/receiving device can be configured without spectrum inversion □. can. However, the number of local oscillators in the transmitter/receiver can be reduced from the conventional two to one. In particular, the frequency F of the local oscillator 10
By selecting the relationship between LI, the transmit RF multiplied signal frequency Fv, and the frequency FR of the receive RF signal as FT~FR=2XFLI, the relationship Ft++=Fv+ is established, and the relationship between the first transmit IF signal and the first receive IF signal The frequencies can be made equal.
第３図は本発明の送受信装置の第２の実施例を示したも
ので第１図と同一箇所には同一番号を付して説明する。FIG. 3 shows a second embodiment of the transmitting/receiving apparatus of the present invention, and the same parts as in FIG. 1 are given the same numbers and will be described.
第３図において、信号入力端子１に入力された第１送信
ＩＦ信号（周波数ＦＴＩ）は第１送信周波数変換器９と
周波数ＦＬＩの局発源により第２送信Ｉ’Ｆ信号（周波
数ＦＴ２）に周波数変換される。１５は分周比一の分周
器（出力周波数ＦＬＩ） 、２０は周波数ＦＬ３の局部
発振器で、周波数ＦＬＩの局発源は局部発振器２０を分
周器１５で分周して得ている。１］は第２送信周波数変
換沫１６は逓倍数Ｎの逓倍器（出力周波数ＦＬ２）で第
２送信周波数変換器１１の局発源になっており、第２送
信ＩＦ信号を送信ＲＦ倍信号周波数ＦＴ）に周波数変換
する。４はサーキューレー久５はアンテナであり、送信
ＲＦ倍信号サーキュレータ４を通過後、アンテナ５から
出力される。In FIG. 3, the first transmission IF signal (frequency FTI) input to the signal input terminal 1 is converted into the second transmission I'F signal (frequency FT2) by the first transmission frequency converter 9 and the local oscillator of frequency FLI. Frequency converted. 15 is a frequency divider with a frequency division ratio of 1 (output frequency FLI); 20 is a local oscillator with a frequency FL3; the local oscillator with the frequency FLI is obtained by dividing the frequency of the local oscillator 20 with the frequency divider 15; 1], the second transmission frequency converter 16 is a multiplier with a multiplier of N (output frequency FL2), which is the local source of the second transmission frequency converter 11, and converts the second transmission IF signal to the transmission RF multiplied signal frequency. FT). Reference numeral 4 indicates a circulator; 5 indicates an antenna; after passing through the transmission RF multiplier signal circulator 4, the signal is output from the antenna 5;
方、受信ＲＦ信号（周波数ＦＲ）はアンテナ５．サーキ
ュレータ４を介して第２受信周波数変換器１３に人力さ
れ 第２受信ＩＦ信号（周波数ＦＲ２）に周波数変換さ
れる、第２受信周波数変換器１３の局発源は逓倍器１６
の出力信号である。１４は第１受信周波数変換器で第２
受信ＩＦ信号変換器の第２受信ＩＦ信号（周波数ＦＲＩ
）に周波数変換し 信号出力端子８に第１受信ＩＦ信号
を出力する。第１受信周波数変換器１４の局発源は分周
器１５の出力信号である。第Ｑ−
１〇−
３図の送受信装置の主要周波数成分はＦＬａを除いてＦ
Ｒ，ＦＴ、ＦＬａ、ＦＲＩ、ＦＴＩ、ＦＬＩ、ＦＲ２，
ＦＴ２の周波数配列関係や周波数間の関係は第２図と全
く同一である。但し 局発源や局部発振器の周波数関係
が第１図の実施例ではＦＬ２＝ ＸＦＬＩであ
ったのに対して、第３図の実施例ではＦＬａ＝ＮＸ Ｍ
Ｘ ＦＬＩ（＝ＮＸ ＦＬＹ）となっている。第３図の
実施例では 以上のような周波数関係に選ぶことにより
、第１受信ＩＦ信号のスペクトラム変換器の第２送信Ｉ
Ｆ信号のスペクトラムと同じ極性にすることができ、ス
ペクトラムの反転が生じることなく送受信装置の局部発
振器を１個に減らすことができる。特に 第１送信周波
数変換器９や第１受信周波数変換器１４の局発源の周波
数ＦＬＩ、送信ＲＦ倍信号周波数ＦＴ、受信ＲＦ信号の
周波数ＰＲの関係をＦｔ〜ＦＲ＝２ＸＦＬＩのように選
ぶことにより、例えば衛星通信のように送信ＲＦ倍信号
周波数と受信ＲＦ信号の周波数とは単に周波数が異なる
場合にζｉ ＦＲＩ＝ＦＴＩの関係が成立し第１送信
ＩＦ信号と第１受信ＩＦ信号の周波数を等しくすること
ができる効果を有する。更に第３図の実施例でζよ 局
部発振２０の周波数ＦＬａを比較的高く選べるので、逓
倍器１６で発生する周波数ＦＬａの高次の高調波スプリ
アスをフィルタ等で除去することが容易になり、周波数
がＦＬａの局発源のスプリアス発生を防止しやすくでき
る効果を有する。まな 逓倍器１６の逓倍次数Ｎを低く
できるので逓倍効率が向上し 周波数Ｆｌｕの局発源の
出力電力を向上させる効果を有する。第４図は本発明の
送受信装置の第３の実施例を示したもので第１図と同一
箇所には同一番号を付して説明する。第４図において、
信号入力端子ｌに人力された第１送信ＩＦ信号（周波数
ＦＬＩ）は第１送信周波数変換器９と周波数ＦＬＩの局
発源により第２送信ＩＦ信号（周波数ＦＴ２）に周波数
変換される。１７は逓倍数Ｍの逓倍器（出力周波数ＦＬ
Ｉ）、３０は周波数ＦＬａの局部発振器で、周波数ＦＬ
Ｉの局発源は局部発振器３０を逓倍器１７てＭ逓倍して
得ている。１１は第２送信周波数変換賑１８は逓倍数Ｎ
の逓倍器（出力周波数ＰＬ２）で第２送信周波数変換器
１１の局発源になっており、第２送１−
２−
信ＩＦ信号を送信ＲＦ倍信号周波数ＦＴ）に周波数変換
する。４はサーキュレータ ５はアンテナであり、送信
ＲＦ倍信号サーキュレータ４を通過後、アンテナ５から
出力される。一方、受信ＲＦ信号（周波数ＰＲ）はアン
テナ５、サーキュレータ４を介して第２受信周波数変換
器１３に入力され 第２受信ＩＦ信号（周波数ＦＲ２）
に周波数変換される。On the other hand, the received RF signal (frequency FR) is transmitted through antenna 5. The local oscillator of the second reception frequency converter 13, which is input to the second reception frequency converter 13 via the circulator 4 and frequency-converted into the second reception IF signal (frequency FR2), is the multiplier 16.
is the output signal of 14 is the first receiving frequency converter;
The second reception IF signal (frequency FRI) of the reception IF signal converter
) and outputs the first reception IF signal to the signal output terminal 8. The local oscillation source of the first receiving frequency converter 14 is the output signal of the frequency divider 15. The main frequency components of the transmitter/receiver shown in Figure Q-10-3 are F except for FLa.
R, FT, FLa, FRI, FTI, FLI, FR2,
The frequency arrangement relationship and the relationship between frequencies in FT2 are exactly the same as in FIG. 2. However, while the frequency relationship of the local oscillator and local oscillator was FL2 = XFLI in the embodiment shown in Figure 1, FLa = NX M in the embodiment shown in Figure 3.
X FLI (=NX FLY). In the embodiment shown in FIG. 3, by selecting the frequency relationship as described above, the second transmission I of the spectrum converter of the first reception IF signal is
The polarity can be the same as the spectrum of the F signal, and the number of local oscillators in the transmitter/receiver can be reduced to one without spectrum inversion. In particular, the relationship between the frequency FLI of the local oscillator of the first transmitting frequency converter 9 and the first receiving frequency converter 14, the transmitting RF multiplied signal frequency FT, and the frequency PR of the receiving RF signal should be selected as Ft~FR=2XFLI. For example, when the frequency of the transmitted RF multiplied signal and the frequency of the received RF signal are simply different, as in satellite communication, the relationship ζi FRI = FTI is established, and the frequencies of the first transmitted IF signal and the first received IF signal are have an effect that can be equalized. Furthermore, in the embodiment shown in FIG. 3, since the frequency FLa of the local oscillation 20 can be selected relatively high, it is easy to remove the high-order harmonic spurious of the frequency FLa generated by the multiplier 16 with a filter or the like. This has the effect of making it easier to prevent spurious generation from a local oscillator whose frequency is FLa. Since the multiplication order N of the multiplier 16 can be lowered, the multiplication efficiency is improved, which has the effect of improving the output power of the local oscillator with the frequency Flu. FIG. 4 shows a third embodiment of the transmitting/receiving apparatus of the present invention, and the same parts as in FIG. 1 are given the same numbers and will be described. In Figure 4,
The first transmission IF signal (frequency FLI) inputted to the signal input terminal l is frequency-converted into a second transmission IF signal (frequency FT2) by the first transmission frequency converter 9 and the local oscillator of frequency FLI. 17 is a multiplier with a multiplication number M (output frequency FL
I), 30 is a local oscillator with frequency FLa, and frequency FL
The local oscillator I is obtained by multiplying the local oscillator 30 by M using the multiplier 17. 11 is the second transmission frequency conversion signal 18 is the multiplication number N
The multiplier (output frequency PL2) serves as a local oscillator for the second transmission frequency converter 11, and frequency-converts the second transmission IF signal to the transmission RF multiplied signal frequency FT). 4 is a circulator; 5 is an antenna; after passing through the transmission RF double signal circulator 4, it is output from the antenna 5; On the other hand, the received RF signal (frequency PR) is input to the second reception frequency converter 13 via the antenna 5 and circulator 4, and the second reception IF signal (frequency FR2) is inputted to the second reception frequency converter 13.
The frequency is converted to
第２受信周波数変換器１３の局発源は逓倍器１８の出力
信号である。１４は第１受信周波数変換器で第２受信Ｉ
Ｆ信号変換器の第２受信ＩＦ信号（周波数ＦＲＩ）に周
波数変換し 信号出力端子８に第１受信ＩＦ信号を出力
する。第１受信周波数変換器１４の局発源は逓倍器１７
の出力信号である。第４図の送受信装置の主要周波数成
分はＦＬＡを除いて、ＦＲ，ＦＴ、ＦＬａ、ＦＲｌ、Ｆ
ＴＩ、ＦＲ２，ＦＴｅの周波数配置関係や周波数間の関
係は第１図、第２図と全く同一である。但し 局発源や
局部発振器の周波数関係が第１図の実施例でＦＬａ−Ｘ
ＦＬＩであったのに対して、第４図の実施例ではＦＬ２
＝ Ｘ ＦＬＩ＝ＮＸ ＦＬａとなっている。第４
図の実施例では 以上のような周波数関係に選ぶことに
より、第１受信ＩＦ信号のスペクトラム変換器の第２送
信ＩＦ信号のスペクトラムと同じ極性にすることができ
、スペクトラムの反転が生じることなく送受信装置の局
部発振器を１個に減らすことができる。時に 第１送信
周波数変換器９や第１受信周波数変換器１４の極発源の
周波数ＦＬｌ、送信ＲＦ倍信号周波数ＦＴ、受信ＲＦ信
号の周波数ＦＲの関係をＦＴ−ＦＲ＝２Ｘ ＦＬＩのよ
うに選ぶことにより、例えば衛星通信のように送信ＲＦ
倍信号周波数と受信ＲＦ信号の周波数とは単に周波数が
異なる場合に（よ Ｆ＋ｕ＝Ｆｖ＋の関係が成立ｔ、、
、第１送信ＩＦ信号と第１受信ＩＦ信号の周波数を等し
くすることができる効果を有する。更阪 第４図の実施
例で１よ 局部発振器３０の周波数ＦＬａが低く選べる
ので、ＦＬａのＮ倍である周波数ＦＬ２の選択できる自
由度は高くなり、従って、ＦＲＩ、ＦＴＩ、ＦＴｕ、Ｆ
ＴＰの値を決める自由度を高くできる効果を有する。The local oscillation source of the second reception frequency converter 13 is the output signal of the multiplier 18. 14 is the first receiving frequency converter and the second receiving frequency converter
The frequency is converted into the second reception IF signal (frequency FRI) of the F signal converter, and the first reception IF signal is output to the signal output terminal 8. The local oscillator of the first reception frequency converter 14 is a multiplier 17
is the output signal of The main frequency components of the transmitter/receiver in Fig. 4 are FR, FT, FLa, FRl, F, excluding FLA.
The frequency arrangement relationship of TI, FR2, and FTe and the relationship between frequencies are completely the same as in FIGS. 1 and 2. However, the frequency relationship of the local oscillator and local oscillator is FLa-X in the embodiment shown in Figure 1.
FLI, whereas in the embodiment shown in Fig. 4, FL2
= X FLI=NX FLa. Fourth
In the example shown in the figure, by selecting the frequency relationship as described above, it is possible to make the polarity of the first receiving IF signal the same as the spectrum of the second transmitting IF signal of the spectrum converter, so that transmission and reception can be performed without spectrum inversion. The local oscillator of the device can be reduced to one. At times, the relationship between the frequency FLl of the polar source of the first transmitting frequency converter 9 and the first receiving frequency converter 14, the transmitting RF multiplied signal frequency FT, and the frequency FR of the receiving RF signal is selected as FT-FR=2X FLI. For example, in satellite communications, the transmission RF
If the frequency of the double signal frequency and the frequency of the received RF signal are simply different, then the relationship F+u=Fv+ holds, t,
, it has the effect of making the frequencies of the first transmission IF signal and the first reception IF signal equal. Sarasaka: In the embodiment shown in Fig. 4, the frequency FLa of the local oscillator 30 can be selected low, so the degree of freedom in selecting the frequency FL2, which is N times FLa, is increased, and therefore FRI, FTI, FTu, F
This has the effect of increasing the degree of freedom in determining the value of TP.
４−
１３−
発明の効果
以上のように本発明（よ 送受信用の送信周波数変換器
および受信用周波数変換器をそれぞれ２重とし 第１送
信周波数変換器や第１受信周波数変換器の局発源の周波
数を第２送信ＩＦ信号の周波数と第２受信ＩＦ信号の周
波数の中間の周波数に選び、第２送信周波数変換器や第
２受信周波数変換器の局発源の周波数を送信ＲＦ信号の
周波数と受信ＲＦ信号の周波数の中間の周波数に選んで
いるので、第１送信ＩＦ信号のスペクトラムと第１受信
ＩＦ信号のスペクトラムが逆極性になるのを避けること
ができる。また ２重の送信および受信周波数変換器に
必要な２つの局発源を同一の局部発振器から得ることが
できるた取 送受信装置に必要な局部発振器の数を少な
くできる。さらに２つの局発源の一方の周波数を送信Ｒ
Ｆ信号と受信ＲＦ信号の差の周波数の１／２に選ぶこと
により、第１送信ＩＦ信号と第１受信ＩＦ信号を同一の
周波数にすることができる。4-13- Effects of the Invention As described above, the present invention has the advantage that the transmitting frequency converter for transmitting and receiving and the receiving frequency converter are each duplicated, and the local oscillator of the first transmitting frequency converter and the first receiving frequency converter is The frequency of the local oscillator of the second transmitting frequency converter and the second receiving frequency converter is selected as the frequency between the frequency of the second transmitting IF signal and the frequency of the second receiving IF signal, and the frequency of the local oscillator of the second transmitting frequency converter and the second receiving frequency converter is selected as the frequency of the transmitting RF signal. Since the frequency is selected to be intermediate between the frequency of the first transmitting IF signal and the frequency of the first receiving IF signal, it is possible to avoid the spectrum of the first transmitting IF signal and the spectrum of the first receiving IF signal having opposite polarities.Also, double transmitting and receiving can be avoided. Since the two local oscillators required for the frequency converter can be obtained from the same local oscillator, the number of local oscillators required for the transceiver can be reduced.Furthermore, the frequency of one of the two local oscillators can be obtained from the same local oscillator.
By selecting 1/2 of the frequency of the difference between the F signal and the received RF signal, the first transmission IF signal and the first reception IF signal can be made to have the same frequency.
第１図は本発明の第１の実施例における送受信装置の構
成例を示すブロックは 第２図は第１図の実施例におけ
る送受信装置の主要周波数成分の周波数配列構成は 第
３図および第４図はそれぞれ本発明の第２および第３図
の実施例における送受信装置の構成例を示すブロック阻
第５図は従来の送受信装置の構成例を示すブロック図
である。
ｌ・・・・信号入力端子、 ４・・・・ザーキュレー久
５・・・・アンテナ、 ８・・・・信号出力端子、 ９
・・・・第１送信周波数変換器１０，２０．３０・・・
・局部発振器１１・・・・第２送信周波数変換凰１２，
１６，１７．１８・・・・逓倍器 １３・・・・第２受
信周波数変換歌１４・・・・第１受信周波数変換歌１５
・・・・分周振FIG. 1 is a block diagram showing an example of the configuration of the transmitting/receiving device in the first embodiment of the present invention. FIG. 2 is a block diagram showing the frequency arrangement configuration of the main frequency components of the transmitting/receiving device in the embodiment of FIG. 1. 5 is a block diagram showing an example of the configuration of a conventional transmitting/receiving apparatus. FIG. 5 is a block diagram showing an example of the configuration of a conventional transmitting/receiving apparatus. l...Signal input terminal, 4...Zercule 5...Antenna, 8...Signal output terminal, 9
...First transmission frequency converter 10, 20, 30...
・Local oscillator 11...Second transmission frequency conversion screen 12,
16, 17.18... Multiplier 13... Second reception frequency conversion song 14... First reception frequency conversion song 15
・・・Divide vibration
Claims (3)
ＲＦ信号に周波数変換し、受信ＲＦ信号を第１受信ＩＦ
信号に周波数変換して信号出力端子より出力し、前記送
信ＲＦ信号の周波数と前記受信ＲＦ信号の周波数が異な
る送受信装置において、前記第１送信ＩＦ信号を第２送
信ＩＦ信号に周波数変換する第１送信周波数変換器と、
前記第２送信ＩＦ信号を前記送信ＲＦ信号に周波数変換
する第２送信周波数変換器と、前記受信ＲＦ信号を第２
受信ＩＦ信号に周波数変換する第２受信周波数変換器と
、前記第２受信ＩＦ信号を前記第１受信ＩＦ信号に周波
数変換する第１受信周波数変換器と、前記送信ＲＦ信号
の周波数と前記受信ＲＦ信号の周波数の差の１／２の周
波数を有する信号を前記第１送信周波数変換器と前記第
１受信周波数変換器の第１局発源とし、前記第１局発源
の周波数のＭ×Ｎ倍（Ｍ、Ｎは正整数）あるいはＮ／Ｍ
倍（Ｍ、Ｎは正整数でＮ＞Ｍ）の周波数を有する信号を
前記第２送信周波数変換器と前記第２受信周波数変換器
の第２局発源としたことを特徴とする送受信装置。(1) Frequency converting the first transmitting IF signal input to the signal input terminal into a transmitting RF signal, and converting the received RF signal to the first receiving IF signal.
In the transmitting/receiving apparatus, the first transmitting IF signal is frequency-converted into a second transmitting IF signal, and the frequency of the transmitting RF signal and the receiving RF signal are different from each other. a transmitting frequency converter;
a second transmission frequency converter that frequency converts the second transmission IF signal into the transmission RF signal; and a second transmission frequency converter that converts the frequency of the second transmission IF signal into the transmission RF signal;
a second reception frequency converter that converts the frequency of the second reception IF signal into the first reception IF signal, a first reception frequency converter that converts the frequency of the second reception IF signal into the first reception IF signal, and a frequency of the transmission RF signal and the reception RF A signal having a frequency that is 1/2 of the difference in frequency of the signals is used as a first local oscillator of the first transmitting frequency converter and the first receiving frequency converter, and the frequency of the first local oscillator is M×N. times (M, N are positive integers) or N/M
A transmitting/receiving device characterized in that a signal having a frequency of 2 times (M, N are positive integers, N>M) is used as a second local source of the second transmitting frequency converter and the second receiving frequency converter.
Ｎ倍とし、第１局発源は、局部発振器を１／Ｍ分周した
信号とし、第２局発源は前記局部発振器をＮ逓倍した信
号としたことを特徴とする請求項１記載の送受信装置。(2) The frequency of the second local oscillation source is M times the frequency of the first local oscillation source.
2. The transmitter/receiver according to claim 1, wherein the first local oscillator is a signal obtained by dividing the frequency of the local oscillator by 1/M, and the second local oscillator is a signal obtained by multiplying the frequency of the local oscillator by N. Device.
Ｍ倍とし、第１局発源は局部発振器をＮ逓倍した信号と
し、第２局発源は前記局部発振器をＮ逓倍した信号とし
たことを特徴とする請求項１記載の送受信装置。(3) Set the frequency of the second local oscillator to N/of the frequency of the first local oscillator.
2. The transmitting/receiving device according to claim 1, wherein the first local oscillator is a signal obtained by multiplying the local oscillator by N, and the second local oscillator is a signal obtained by multiplying the local oscillator by N.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20336989A JPH0366233A (en) | 1989-08-05 | 1989-08-05 | Transmitter-receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20336989A JPH0366233A (en) | 1989-08-05 | 1989-08-05 | Transmitter-receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0366233A true JPH0366233A (en) | 1991-03-20 |
Family
ID=16472891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20336989A Pending JPH0366233A (en) | 1989-08-05 | 1989-08-05 | Transmitter-receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0366233A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998001966A1 (en) * | 1996-07-04 | 1998-01-15 | Seiko Instruments Inc. | Semiconductor integrated circuit for communication and battery saving method for the same |
| US5937335A (en) * | 1995-04-13 | 1999-08-10 | Samsung Electronics Co., Ltd. | Transmission and reception apparatus having a single phase-locked loop and method thereof |
| KR100363796B1 (en) * | 2000-04-20 | 2002-12-11 | 엘디케이전자 주식회사 | Wireless transceiver using a three multiplier |
| JP2005532765A (en) * | 2002-07-10 | 2005-10-27 | トムソン ライセンシング | VHF adapter for cable network |
-
1989
- 1989-08-05 JP JP20336989A patent/JPH0366233A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5937335A (en) * | 1995-04-13 | 1999-08-10 | Samsung Electronics Co., Ltd. | Transmission and reception apparatus having a single phase-locked loop and method thereof |
| WO1998001966A1 (en) * | 1996-07-04 | 1998-01-15 | Seiko Instruments Inc. | Semiconductor integrated circuit for communication and battery saving method for the same |
| KR100363796B1 (en) * | 2000-04-20 | 2002-12-11 | 엘디케이전자 주식회사 | Wireless transceiver using a three multiplier |
| JP2005532765A (en) * | 2002-07-10 | 2005-10-27 | トムソン ライセンシング | VHF adapter for cable network |
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